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Kline GA, Leung AA. Increasing the number of surgically cured primary aldosteronism patients: The promise of simplified diagnosis and advanced nuclear adrenocortical imaging. Am J Surg 2024; 229:193-195. [PMID: 37945470 DOI: 10.1016/j.amjsurg.2023.10.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 10/24/2023] [Indexed: 11/12/2023]
Affiliation(s)
- G A Kline
- Department of Medicine/Endocrinology, Cumming School of Medicine, University of Calgary, Canada.
| | - A A Leung
- Department of Medicine/Endocrinology, Cumming School of Medicine, University of Calgary, Canada
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2
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Mah D, Kneteman M, Przybojewski SJ, Kotha V, Kline GA, Leung AA, So CB. Multiple radiologist review of adrenal CT still frequently misses lateralized surgical primary aldosteronism. J Clin Hypertens (Greenwich) 2024; 26:47-52. [PMID: 38083996 PMCID: PMC10795078 DOI: 10.1111/jch.14747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 09/23/2023] [Accepted: 10/25/2023] [Indexed: 01/19/2024]
Abstract
Patients with primary aldosteronism (PA) have increased morbidity and mortality compared to those with essential hypertension. Accurate detection of lateralized PA is important so that affected patients can receive potentially curative adrenalectomy. However, around 40% of patients with lateralized PA have "normal" adrenal glands on computed tomography (CT). Additional independent review of imaging has been shown to improve diagnostic accuracy in many areas of imaging. Therefore, the authors sought to establish if multi-reader re-assessment of previously reported normal CT scans would result in increased detection of surgically remediable disease. The authors found that re-assessment of CT imaging by one, two, or three additional radiologists (or a combination thereof) slightly increased the detection of lateralized disease, but these differences were not statistically significant (p > .05). Readers had low inter-observer agreement (kappa = 0.17). If detection of a discrete nodule on CT was made a prerequisite for adrenal vein sampling (AVS), a second read by another reviewer would still result in an excess of missed cases (84.2%, 36.8%, and 65.8%, respectively, for each of the three independent reviewers). Therefore, a "normal" CT does not preclude the possibility of lateralized PA. Adrenal vein sampling should still be strongly considered wherever available and whenever surgery is considered for treatment of PA, irrespective of CT findings.
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Affiliation(s)
- Darren Mah
- Department of RadiologyUniversity of CalgaryCalgaryABCanada
| | - Mark Kneteman
- Department of RadiologyUniversity of CalgaryCalgaryABCanada
| | | | - Vamshi Kotha
- Clinical Assistant ProfessorUniversity of CalgaryCalgaryABCanada
| | - Gregory A. Kline
- Department of MedicineDivision of Endocrinology and MetabolismUniversity of CalgaryCalgaryABCanada
| | - Alexander A. Leung
- Department of MedicineDivision of Endocrinology and MetabolismUniversity of CalgaryCalgaryABCanada
- Department of Community Health SciencesUniversity of CalgaryCalgaryABCanada
| | - C. Benny So
- Department of RadiologyUniversity of CalgaryCalgaryABCanada
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Leung AA, Symonds CJ, Hundemer GL, Ronksley PE, Lorenzetti DL, Pasieka JL, Harvey A, Kline GA. Performance of Confirmatory Tests for Diagnosing Primary Aldosteronism: a Systematic Review and Meta-Analysis. Hypertension 2022; 79:1835-1844. [PMID: 35652330 PMCID: PMC9278709 DOI: 10.1161/hypertensionaha.122.19377] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Background: Confirmatory tests are recommended for diagnosing primary aldosteronism, but the supporting evidence is unclear. Methods: We searched Medline, EMBASE, and the Cochrane Central Register of Controlled Trials. Studies evaluating any guideline-recommended confirmatory test (ie, saline infusion test, salt loading test, fludrocortisone suppression test, and captopril challenge test), compared with a reference standard were included. The Quality Assessment of Diagnostic Accuracy Studies-2 tool was used to assess the risk of bias. Meta-analyses were conducted using hierarchical summary receiver operating characteristic models. Results: Fifty-five studies were included, comprising 26 studies (3654 participants) for the recumbent saline infusion test, 4 studies (633 participants) for the seated saline infusion test, 2 studies (99 participants) for the salt loading test, 7 studies (386 participants) for the fludrocortisone suppression test, and 25 studies (2585 participants) for the captopril challenge test. Risk of bias was high, affecting more than half of studies, and across all domains. Studies with case-control sampling overestimated accuracy by 7-fold (relative diagnostic odds ratio, 7.26 [95% CI, 2.46–21.43]) and partial verification or use of inconsistent reference standards overestimated accuracy by 5-fold (5.12 [95% CI, 1.48–17.77]). There were large variations in how confirmatory tests were conducted, interpreted, and verified. Under most scenarios, confirmatory testing resulted in an excess of missed cases. The certainty of evidence underlying each test (Grading of Recommendations, Assessment, Development, and Evaluations) was very low. Conclusions: Recommendations for confirmatory testing in patients with abnormal screening tests and high probability features of primary aldosteronism are based on very low-quality evidence and their routine use should be reconsidered.
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Affiliation(s)
- Alexander A Leung
- Division of Endocrinology and Metabolism, Department of Medicine (A.A.L., C.J.S., G.A.K.), University of Calgary, AB.,Department of Community Health Sciences (A.A.L., P.E.R., D.L.L.), University of Calgary, AB
| | - Christopher J Symonds
- Division of Endocrinology and Metabolism, Department of Medicine (A.A.L., C.J.S., G.A.K.), University of Calgary, AB
| | - Gregory L Hundemer
- Division of Nephrology, Department of Medicine and the Ottawa Hospital Research Institute, University of Ottawa, ON (G.L.H.)
| | - Paul E Ronksley
- Department of Community Health Sciences (A.A.L., P.E.R., D.L.L.), University of Calgary, AB
| | - Diane L Lorenzetti
- Department of Community Health Sciences (A.A.L., P.E.R., D.L.L.), University of Calgary, AB
| | - Janice L Pasieka
- Department of Surgery (J.L.P., A.H.), University of Calgary, AB.,Department of Oncology (J.L.P., A.H.), University of Calgary, AB
| | - Adrian Harvey
- Department of Surgery (J.L.P., A.H.), University of Calgary, AB.,Department of Oncology (J.L.P., A.H.), University of Calgary, AB
| | - Gregory A Kline
- Division of Endocrinology and Metabolism, Department of Medicine (A.A.L., C.J.S., G.A.K.), University of Calgary, AB
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Sam D, Kline GA, So B, Hundemer GL, Pasieka JL, Harvey A, Chin A, Przybojewski SJ, Caughlin CE, Leung AA. External Validation of Clinical Prediction Models in Unilateral Primary Aldosteronism. Am J Hypertens 2022; 35:365-373. [PMID: 34958097 PMCID: PMC8976177 DOI: 10.1093/ajh/hpab195] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/03/2021] [Accepted: 12/22/2021] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Targeted treatment of primary aldosteronism (PA) is informed by adrenal vein sampling (AVS), which remains limited to specialized centers. Clinical prediction models have been developed to help select patients who would most likely benefit from AVS. Our aim was to assess the performance of these models for PA subtyping. METHODS This external validation study evaluated consecutive patients referred for PA who underwent AVS at a tertiary care referral center in Alberta, Canada during 2006–2018. In alignment with the original study designs and intended uses of the clinical prediction models, the primary outcome was the presence of lateralization on AVS. Model discrimination was evaluated using the C-statistic. Model calibration was assessed by comparing the observed vs. predicted probability of lateralization in the external validation cohort. RESULTS The validation cohort included 342 PA patients who underwent AVS (mean age, 52.1 years [SD, 11.5]; 201 [58.8%] male; 186 [54.4%] with lateralization). Six published models were assessed. All models demonstrated low-to-moderate discrimination in the validation set (C-statistics; range, 0.60–0.72), representing a marked decrease compared with the derivation sets (range, 0.80–0.87). Comparison of observed and predicted probabilities of unilateral PA revealed significant miscalibration. Calibration-in-the-large for every model was >0 (range, 0.35–1.67), signifying systematic underprediction of lateralizing disease. Calibration slopes were consistently <1 (range, 0.35–0.87), indicating poor performance at the extremes of risk. CONCLUSIONS Overall, clinical prediction models did not accurately predict AVS lateralization in this large cohort. These models cannot be reliably used to inform the decision to pursue AVS for most patients.
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Affiliation(s)
- Davis Sam
- Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Gregory A Kline
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Benny So
- Department of Radiology, University of Calgary, Calgary, Alberta, Canada
| | | | - Janice L Pasieka
- Department of Surgery, University of Calgary, Calgary, Alberta, Canada
| | - Adrian Harvey
- Department of Surgery, University of Calgary, Calgary, Alberta, Canada
| | - Alex Chin
- Alberta Precision Laboratories, Alberta Health Services, Calgary, Alberta, Canada
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada
| | | | - Cori E Caughlin
- Department of Radiology, University of Calgary, Calgary, Alberta, Canada
| | - Alexander A Leung
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
- Correspondence: Alexander A. Leung ()
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Kline GA, So B, Campbell DJT, Chin A, Harvey A, Venos E, Pasieka J, Leung AA. Apparent failed and discordant adrenal vein sampling: A potential confounding role of cortisol cosecretion? Clin Endocrinol (Oxf) 2022; 96:123-131. [PMID: 34160833 DOI: 10.1111/cen.14546] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 05/05/2021] [Accepted: 06/07/2021] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Adrenal vein sampling (AVS) and computed tomography (CT) often show confusingly discordant lateralisation results in primary aldosteronism (PA). We tested a biochemical algorithm using AVS data to detect cortisol cosecretion as a potential explanation for discordant cases. DESIGN Retrospective analysis from a large PA + AVS database. PATIENTS All patients with PA and AVS, 2005-2020. MEASUREMENTS An algorithm using biochemical data from paired AVS + CT images was devised from physiological first principles and informed by data from unilateral, AVS-CT concordant patients. The algorithm involved calculations based upon the expectation that low cortisol levels exist in adrenal vein effluent opposite an aldosterone-and-cortisol-producing adrenal mass and may reverse lateralisation due to inflated aldosterone/cortisol ratios. MAIN OUTCOMES The algorithm was applied to cases with discordant CT-AVS lateralisation to determine whether this might be a common or explanatory finding. Clinical and biochemical characteristics of identified cases were collected via chart review and compared to CT-AVS concordant cases to detect evidence of biological plausibility for cortisol cosecretion. RESULTS From a total of 588 AVS cases, 141 AVS + CT pairs were clear unilateral PA cases, used to develop the three-step algorithm for AVS interpretation. Applied to 88 AVS + CT discordant pairs, the algorithm suggested possible cortisol cosecretion in 40%. Case review showed that the proposed cortisol cosecretors, as identified by the algorithm, had low/suppressed adrenocorticotropic hormone levels, larger average nodule size and lower plasma aldosterone. CONCLUSIONS Pending external validation and outcome verification by surgery and tissue immunohistochemistry, cortisol cosecretion from aldosteronomas may be a common explanation for discordant CT-AVS results in PA.
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Affiliation(s)
- Gregory A Kline
- Division of Endocrinology, Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Benny So
- Department of Radiology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - David J T Campbell
- Division of Endocrinology, Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Alex Chin
- Department of Clinical Pathology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Alberta Precision Laboratories, Calgary, Alberta, Canada
| | - Adrian Harvey
- Department of Surgery, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Erik Venos
- Division of Endocrinology, Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Janice Pasieka
- Department of Surgery, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Alexander A Leung
- Division of Endocrinology, Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
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Liu YY, King J, Kline GA, Padwal RS, Pasieka JL, Chen G, So B, Harvey A, Chin A, Leung AA. Outcomes of a Specialized Clinic on Rates of Investigation and Treatment of Primary Aldosteronism. JAMA Surg 2021; 156:541-549. [PMID: 33787826 DOI: 10.1001/jamasurg.2021.0254] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Importance Primary aldosteronism (PA) is one of the most common causes of secondary hypertension but remains largely unrecognized and untreated. Objective To understand the outcomes of a specialized clinic on rates of evaluation and treatment of PA in the context of secondary factors. Design, Setting, and Participants This population-based cohort study was conducted in Alberta, Canada, using linked administrative data between April 1, 2012, and July 31, 2019, on adults identified as having hypertension. Main Outcomes and Measures We evaluated each step of the diagnostic and care pathway for PA to determine the proportion of people with hypertension who received screening, subtyping, and targeted treatment for PA. Variations in diagnosis and treatment were examined according to individual-level, clinician-level, and system-level characteristics. Results Of the 1.1 million adults with hypertension, 7941 people (0.7%) were screened for PA. Among those who were screened, 1703 (21.4%) had positive test results consistent with possible PA, and 1005 (59.0%) of these were further investigated to distinguish between unilateral and bilateral forms of PA. Only 731 individuals (42.9%) with a positive screen result received disease-targeted treatment. Geographic zones and clinician specialty were the strongest determinants of screening, subtyping, and treatment of PA, with the highest rates corresponding to the location of the provincial endocrine hypertension program. Conclusions and Relevance In this cohort, less than 1% of patients expected to have PA were ever formally diagnosed and treated. These findings suggest that a system-level approach to assist with investigation and treatment of PA may be highly effective in closing care gaps and improving clinical outcomes.
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Affiliation(s)
- Yuan-Yuan Liu
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - James King
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada.,Alberta SPOR SUPPORT Unit Data Platform, Alberta Health Services, Calgary, Alberta, Canada
| | - Gregory A Kline
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Raj S Padwal
- Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Janice L Pasieka
- Department of Surgery, University of Calgary, Calgary, Alberta, Canada
| | - Guanmin Chen
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Benny So
- Department of Radiology, University of Calgary, Calgary, Alberta, Canada
| | - Adrian Harvey
- Department of Surgery, University of Calgary, Calgary, Alberta, Canada
| | - Alex Chin
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada.,Alberta Precision Laboratories, Alberta Health Services, Calgary, Alberta, Canada
| | - Alexander A Leung
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada.,Division of Endocrinology & Metabolism, University of Calgary, Calgary, Alberta, Canada
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Kline GA, Leung AAC, Sam D, Chin A, So B. Repeat Adrenal Vein Sampling in Aldosteronism: Reproducibility and Interpretation of Persistently Discordant Results. J Clin Endocrinol Metab 2021; 106:e1170-e1178. [PMID: 33320942 PMCID: PMC7947749 DOI: 10.1210/clinem/dgaa930] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Indexed: 01/09/2023]
Abstract
CONTEXT The reproducibility of adrenal vein sampling (AVS) is unknown. OBJECTIVE This work aimed to determine reproducibility of biochemical results and diagnostic lateralization in patients undergoing repeat AVS. METHODS A retrospective chart review was conducted of single-center, single-operator AVS procedures at a tertiary care center. Included were patients with confirmed primary aldosteronism (PA) undergoing repeat AVS because of concerns about technical success or discordant diagnostic results. Simultaneous AVS was performed by an experienced operator using a consistent protocol of precosyntropin and postcosyntropin infusion. Among successfully catheterized adrenal veins (selectivity index ≥ 2), the correlation of the adrenalaldosterone/cortisol (A/C) ratio was measured between the first and second AVS. The secondary outcome measure was diagnostic agreement on repeat AVS lateralization (lateralization index ≥ 3). RESULTS There were 46 sets of AVS from 23 patients at a median of 3 months apart. There was moderate correlation in A/C ratios in the adrenal veins and inferior vena cava (Spearman r = 0.49-0.59, P < .05) pre cosyntropin. Post cosyntropin, the correlation was better (Spearman r = 0.67-0.76, P < .05). In technically successful AVS, there was moderate correlation between the repeated lateralization indices (Spearman r = 0.53, P < .05). In 15 patients in whom repeat AVS was performed because of apparent lateralization discordance with computed tomography imaging, the final diagnosis was the same in the second AVS procedure. Initial failed AVS was successful 75% of the time on repeat attempt. CONCLUSION Repeat AVS was feasible and usually successful when an initial attempt failed. There was modest correlation between individual repeat adrenal A/C ratios and lateralization indices when AVS was performed twice. The final lateralization diagnosis was identical in all cases. This demonstrates that AVS is a reliable and reproducible localizing test in PA.
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Affiliation(s)
- Gregory A Kline
- Division of Endocrinology, Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Correspondence: Gregory A. Kline, MD, Division of Endocrinology, Department of Medicine, Cumming School of Medicine, University of Calgary, 1820 Richmond Rd SW, Calgary, AB, T2T 5C7 Canada.
| | - Alexander Ah-Chi Leung
- Division of Endocrinology, Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Department of Community Health Sciences, University of Calgary, Calgary, AB, Canada
| | - Davis Sam
- Division of Endocrinology, Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Alex Chin
- Department of Clinical Pathology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Alberta Precision Laboratories, AB, Canada
| | - Benny So
- Department of Radiology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
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Sam D, Kline GA, So B, Pasieka JL, Harvey A, Chin A, Przybojewski SJ, Leung AA. Surgical Outcomes Among Primary Aldosteronism Patients Without Visible Adrenal Lesions. J Clin Endocrinol Metab 2021; 106:e824-e835. [PMID: 33180934 PMCID: PMC7823310 DOI: 10.1210/clinem/dgaa821] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Indexed: 12/13/2022]
Abstract
CONTEXT Many patients with unilateral primary aldosteronism (PA) have normal adrenal imaging, but little is known about their outcome following adrenalectomy. OBJECTIVE To evaluate biochemical and clinical outcomes after adrenalectomy in patients with unilateral PA and normal-appearing adrenal imaging. DESIGN Retrospective cohort study of patients seen between January 2006 and May 2018. SETTING A Canadian tertiary care PA referral center. PATIENTS Consecutive individuals with PA, normal cross-sectional adrenal imaging, and lateralizing adrenal vein sampling (AVS) who underwent adrenalectomy during the study period. PRIMARY OUTCOME Biochemical response to adrenalectomy graded according to the Primary Aldosteronism Surgical Outcome criteria. RESULTS A total of 40 patients were included. Biochemical outcomes were available for 33 people (mean age, 54.7 years; 91% male; median follow-up, 2.7 months), with 28 (85%) showing a complete or partial response and 5 (15%) with no response. Clinical outcomes were available for 36 people (mean age, 54.6 years; 86% male; median follow-up, 9.8 months), with 31 (86%) demonstrating a complete or partial response and 5 (14%) with no response. CONCLUSIONS The prognosis after adrenalectomy is highly favorable for patients with unilateral PA and normal-appearing adrenal imaging. Patients with lateralizing disease should be considered for surgery despite apparently normal adrenal imaging.
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Affiliation(s)
- Davis Sam
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Gregory A Kline
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Benny So
- Department of Radiology, University of Calgary, Calgary, Alberta, Canada
| | - Janice L Pasieka
- Department of Surgery, University of Calgary, Calgary, Alberta, Canada
| | - Adrian Harvey
- Department of Surgery, University of Calgary, Calgary, Alberta, Canada
| | - Alex Chin
- Alberta Precision Laboratories, Alberta Health Services, Calgary, Alberta, Canada
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada
| | | | - Alexander A Leung
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
- Correspondence and Reprint Requests: Alexander A. Leung, MD, MPH, 1820 Richmond Road SW, Calgary, Alberta, T2T 5C7, Canada. E-mail:
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Bouchard-Bellavance R, Perrault F, Soulez G, Chagnon M, Kline GA, Bourdeau I, Lacroix A, So B, Therasse E. Adrenal vein sampling: External validation of multinomial regression modelling and left adrenal vein-to-peripheral vein ratio to predict lateralization index without right adrenal vein sampling. Clin Endocrinol (Oxf) 2020; 93:661-671. [PMID: 32687640 DOI: 10.1111/cen.14295] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 06/23/2020] [Accepted: 07/12/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Adrenal vein sampling (AVS) failure is mainly due to right adrenal vein unavailability. Multinomial regression modelling (MRM) and left adrenal vein-to-peripheral vein ratio (LAV/PV) were proposed to predict the lateralization index without the right AVS. OBJECTIVE To assess external validity of MRM and LAV/PV to predict lateralization index when right adrenal vein sampling is missing. DESIGN Diagnostic retrospective study. PATIENTS Development and validation cohorts included AVS of 174 and 122 patients, respectively, from 2 different centres. MEASUREMENTS Development and validation cohort data were used, respectively, for calibration and for validation of MRM and LAV/PV to predict the lateralization index without the right adrenal vein sampling. Sensitivity and specificity of MRM and LAV/PV were compared between both centres at different pre-established specificity thresholds based on receiver operating characteristic curves generated from the development cohort data. RESULTS At a specificity threshold of 95% set in the development cohort, specificity values exceeded 90% (range, 90.6%-98.8%) for all verified MRM and LAV/PV models in the validation cohort. Corresponding sensitivities for MRM and LAV/PV, respectively, range from 54.1% to 83.7% and 32.8% to 88.4% for the development cohort compared to 33.3%-87.5% and 2.8%-79.2% for the validation cohort. Overall, diagnostic accuracy of both methods was higher to detect right (82.8%-93.5%) than left (70.2%-80.6%) lateralization index status in both centres. CONCLUSIONS Minimal changes in specificity from development to validation cohorts validate the use of MRM and LAV/PV to predict the lateralization index when the right AVS is missing. Both methods had better accuracy for right than left lateralization detection.
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Affiliation(s)
| | - Florence Perrault
- Department of Radiology, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, QC, Canada
| | - Gilles Soulez
- Department of Radiology, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, QC, Canada
- Centre de Recherche du CHUM (CRCHUM), Montreal, QC, Canada
| | - Miguel Chagnon
- Department of Mathematics and Statistics, Pavillon André-Aisenstadt, University of Montreal, Montreal, QC, Canada
| | - Gregory A Kline
- Division of Endocrinology, Department of Medicine, Foothills Medical Center (FMC), Calgary, AB, Canada
| | - Isabelle Bourdeau
- Centre de Recherche du CHUM (CRCHUM), Montreal, QC, Canada
- Division of Endocrinology, Department of Medicine, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, QC, Canada
| | - André Lacroix
- Centre de Recherche du CHUM (CRCHUM), Montreal, QC, Canada
- Division of Endocrinology, Department of Medicine, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, QC, Canada
| | - Benny So
- Department of Radiology, Foothills Medical Center (FMC), Calgary, AB, Canada
| | - Eric Therasse
- Department of Radiology, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, QC, Canada
- Centre de Recherche du CHUM (CRCHUM), Montreal, QC, Canada
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Sam D, Kline GA, So B, Przybojewski SJ, Leung AA. Unilateral Disease Is Common in Patients With Primary Aldosteronism Without Adrenal Nodules. Can J Cardiol 2020; 37:269-275. [PMID: 32428615 DOI: 10.1016/j.cjca.2020.05.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 04/21/2020] [Accepted: 05/09/2020] [Indexed: 10/24/2022] Open
Abstract
BACKGROUND Patients with primary aldosteronism (PA) without apparent adrenal nodularity have not been well characterised in the literature. The aim of this study was to assess for unilateral aldosterone hypersecretion among patients with primary aldosteronism with normal-appearing adrenals using adrenal vein sampling (AVS). METHODS In this cross-sectional study performed at a Canadian tertiary care centre, we reviewed all consecutive PA patients lacking a definitive adrenal nodule who were referred for AVS in the work-up of PA between January 2006 and May 2018. AVS indications included an elevated aldosterone-to-renin ratio and high-probability features of PA. RESULTS In total, 174 patients were included (mean age, 52.0 years; 62.6% male), and 70 (40.2%) had unilateral aldosterone hypersecretion. There was a positive linear association between higher age categories (by decade) and lateralisation (P = 0.03). For every decade of age, there was a 30% higher odds of lateralisation (odds ratio, 1.03 per year; 95% confidence interval, 1.00-1.05). The frequency of lateralisation was higher in males compared with females (47.7% vs 27.7%), with a 2-fold greater odds of unilateral disease (odds ratio, 2.38; 95% confidence interval, 1.23-4.61). Traditional biomarkers of lateralisation among patients with adrenal nodules (eg, serum potassium and aldosterone-to-renin ratio levels) were not predictive of lateralisation in this population. CONCLUSIONS Many patients with PA who lack definitive adrenal nodules have lateralising disease. Efforts to optimise referrals for AVS may be prioritised by focusing on patients most likely to have unilateral disease, especially males and older adults.
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Affiliation(s)
- Davis Sam
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Gregory A Kline
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Benny So
- Department of Radiology, University of Calgary, Calgary, Alberta, Canada
| | | | - Alexander A Leung
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada; Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada.
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Application of strict criteria in adrenal venous sampling increases the proportion of missed patients with unilateral disease who benefit from surgery for primary aldosteronism. J Hypertens 2019; 36:1407-1413. [PMID: 29465715 DOI: 10.1097/hjh.0000000000001693] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVES Adrenal vein sampling (AVS) is intended to confirm unilateral forms of primary aldosteronism, which are amenable to surgical cure. Excessively strict AVS criteria to define lateralization may result in many patients incorrectly categorized as bilateral primary aldosteronism and opportunity for surgical cure missed. METHODS Retrospective review of an AVS-primary aldosteronism database in which surgical cases are verified by standardized outcomes. Having used 'less strict' AVS criteria for lateralization, we examined the distribution of AVS lateralization indices in our confirmed unilateral primary aldosteronism cases both with and without cosyntropin stimulation. The proportion of proven unilateral cases that would have been missed with stricter AVS interpretation criteria was calculated. Particular focus was given to the proportion of missed cases according to use of international guidelines. False-positive lateralization with 'less strict' interpretation was also calculated. RESULTS Of 80 surgical primary aldosteronism cases, 10-23% would have been missed with AVS lateralization indices of 3 : 1 to 5 : 1, with or without cosyntropin. If strict selectivity indices (for confirmation of catheterization) were combined with strict lateralization indices, up to 70% of unilateral primary aldosteronism cases could have been missed. Use of Endocrine Society AVS guidelines would have missed 21-43% of proven unilateral cases. 'Less strict' AVS interpretation yielded one case (1.2%) of false lateralization. CONCLUSION Excessively strict AVS interpretation criteria will result in a high rate of missed unilateral primary aldosteronism with subsequent loss of opportunity for intervention. Use of more lenient lateralization criteria will improve the detection rate of unilateral primary aldosteronism with very low false-positive rate.
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12
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Sam D, Kline GA, So B, Leung AA. Discordance Between Imaging and Adrenal Vein Sampling in Primary Aldosteronism Irrespective of Interpretation Criteria. J Clin Endocrinol Metab 2019; 104:1900-1906. [PMID: 30590677 DOI: 10.1210/jc.2018-02089] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 12/19/2018] [Indexed: 11/19/2022]
Abstract
BACKGROUND Subtyping of primary aldosteronism (PA) using imaging and adrenal vein sampling (AVS) may yield discordant results, causing confusion in management. Interpretation criteria for AVS lateralization may affect discordance rates. METHODS We identified consecutive patients with PA who underwent AVS at a quaternary care center between January 2006 and May 2018. Patient demographics, laboratory results, diagnostic imaging, and AVS results were retrieved. Adrenal cross-sectional imaging was compared with AVS findings. The presence of lateralization was defined using varying thresholds for the lateralization index (LI) from >2:1 to >5:1. Discordance was defined by a unilateral lesion on imaging with contralateral or nonlateralization on AVS. RESULTS A total of 342 patients were included; 68.7% had hypokalemia. With cross-sectional imaging, 191 (55.6%) patients had unilateral lesions, 47 (13.7%) had bilateral lesions, and 104 (30.4%) had normal imaging. Overall discordance rates were high, ranging from 22% to 28% for LI thresholds of >2:1 and >5:1, respectively. Discordance between imaging and AVS was positively correlated with LI threshold stringency (P < 0.001). Patients with normal or bilateral lesions on imaging frequently lateralized on AVS. Lateralization, when present, was approximately equal between left and right sides, irrespective of the LI threshold. CONCLUSIONS Discrepancies between imaging and AVS were common, even among patients with nonspecific imaging. Discordance was greatest with the strictest AVS interpretation criteria. Even under the most lenient thresholds, apparent discordance between imaging and AVS exceeded 20% and may limit the ability to make surgical decisions. Reliance on imaging alone for detecting lateralization may be misleading.
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Affiliation(s)
- Davis Sam
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Gregory A Kline
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Benny So
- Department of Radiology, University of Calgary, Calgary, Alberta, Canada
| | - Alexander A Leung
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
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13
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Surprisingly low aldosterone levels in peripheral veins following intravenous sedation during adrenal vein sampling. J Hypertens 2019; 37:596-602. [DOI: 10.1097/hjh.0000000000001905] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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14
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Nanba AT, Wannachalee T, Shields JJ, Byrd JB, Rainey WE, Auchus RJ, Turcu AF. Adrenal Vein Sampling Lateralization Despite Mineralocorticoid Receptor Antagonists Exposure in Primary Aldosteronism. J Clin Endocrinol Metab 2019; 104:487-492. [PMID: 30239792 PMCID: PMC6316984 DOI: 10.1210/jc.2018-01299] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 09/10/2018] [Indexed: 11/19/2022]
Abstract
CONTEXT Many antihypertensive medications modulate the renin-angiotensin-aldosterone system, possibly skewing the diagnosis and subtyping of primary aldosteronism (PA). Particularly, mineralocorticoid receptor antagonists (MRA) might raise renin and stimulate aldosterone synthesis from nonautonomous areas, potentially obscuring lateralization on adrenal vein sampling (AVS). Withdrawal of MRA in severe PA, however, can precipitate hypokalemia and/or hypertension and therefore is not always practical. OBJECTIVE To assess the effects of MRA on the interpretation of AVS data. DESIGN AND PARTICIPANTS A cohort study of all PA patients who underwent AVS at University of Michigan between January 2009 and January 2018 was conducted. Demographics, diagnostic, AVS, surgical pathology, and follow-up data were collected retrospectively. RESULTS Of 191 patients who underwent AVS, 51 (27%) were exposed to MRA at the time of the procedure. Plasma aldosterone concentration and the daily defined dose of antihypertensives were higher in patients taking vs those not taking MRA. Unilateral PA was more frequent in the MRA group, both precosyntropin and postcosyntropin (P < 0.05). The MRA group included two patients with unsuppressed renin, who demonstrated unequivocal AVS lateralization. To date, 86 patients underwent unilateral adrenalectomy, including 30 patients taking MRA during AVS. The proportion of clinical and biochemical success was not statistically different between patients exposed to and those not exposed to MRA during AVS (P = 0.17 and 0.65, respectively). CONCLUSION Our data suggest that conclusive AVS lateralization is often achieved in patients with severe PA despite MRA use.
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Affiliation(s)
- Aya T Nanba
- Division of Metabolism, Endocrinology, and Diabetes, University of Michigan, Ann Arbor, Michigan
| | - Taweesak Wannachalee
- Division of Metabolism, Endocrinology, and Diabetes, University of Michigan, Ann Arbor, Michigan
- Division of Endocrinology and Metabolism, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - James J Shields
- Department of Radiology, University of Michigan, Ann Arbor, Michigan
| | - James B Byrd
- Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan
| | - William E Rainey
- Division of Metabolism, Endocrinology, and Diabetes, University of Michigan, Ann Arbor, Michigan
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan
| | - Richard J Auchus
- Division of Metabolism, Endocrinology, and Diabetes, University of Michigan, Ann Arbor, Michigan
- Department of Pharmacology, University of Michigan, Ann Arbor, Michigan
| | - Adina F Turcu
- Division of Metabolism, Endocrinology, and Diabetes, University of Michigan, Ann Arbor, Michigan
- Correspondence and Reprint Requests: Adina F. Turcu, MD, Division of Metabolism, Endocrinology and Diabetes, University of Michigan, 1150 W Medical Center Drive, MSRB II, 5570B, Ann Arbor, Michigan 48109. E-mail:
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A Multi-institutional Comparison of Adrenal Venous Sampling in Patients with Primary Aldosteronism: Caution Advised if Successful Bilateral Adrenal Vein Sampling is Not Achieved. World J Surg 2017; 42:466-472. [DOI: 10.1007/s00268-017-4327-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Kline GA, Prebtani APH, Leung AA, Schiffrin EL. Primary aldosteronism: a common cause of resistant hypertension. CMAJ 2017; 189:E773-E778. [PMID: 28584041 DOI: 10.1503/cmaj.161486] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Gregory A Kline
- Department of Endocrinology (Kline, Leung), University of Calgary, Calgary, Alta.; Department of Internal Medicine, Endocrinology and Metabolism (Prebtani), McMaster University, Hamilton, Ont.; Department of Medicine (Schiffrin), Jewish General Hospital and Lady Davis Research Institute, McGill University, Montréal, Que.
| | - Ally P H Prebtani
- Department of Endocrinology (Kline, Leung), University of Calgary, Calgary, Alta.; Department of Internal Medicine, Endocrinology and Metabolism (Prebtani), McMaster University, Hamilton, Ont.; Department of Medicine (Schiffrin), Jewish General Hospital and Lady Davis Research Institute, McGill University, Montréal, Que
| | - Alexander A Leung
- Department of Endocrinology (Kline, Leung), University of Calgary, Calgary, Alta.; Department of Internal Medicine, Endocrinology and Metabolism (Prebtani), McMaster University, Hamilton, Ont.; Department of Medicine (Schiffrin), Jewish General Hospital and Lady Davis Research Institute, McGill University, Montréal, Que
| | - Ernesto L Schiffrin
- Department of Endocrinology (Kline, Leung), University of Calgary, Calgary, Alta.; Department of Internal Medicine, Endocrinology and Metabolism (Prebtani), McMaster University, Hamilton, Ont.; Department of Medicine (Schiffrin), Jewish General Hospital and Lady Davis Research Institute, McGill University, Montréal, Que
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17
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Leung AA, Orton DJ, Chin A, Sadrzadeh H, Kline GA. Novel Approach to Establishing an Aldosterone: Renin Ratio Cutoff for Primary Aldosteronism. Hypertension 2017; 69:450-456. [DOI: 10.1161/hypertensionaha.116.08407] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 09/21/2016] [Accepted: 12/16/2016] [Indexed: 11/16/2022]
Abstract
Direct renin concentration is replacing plasma renin activity in many laboratories for the investigation of primary aldosteronism, which may have a significant impact on the resulting aldosterone:renin ratios. We sought to develop a population-based approach to establishing an aldosterone:renin ratio cutoff when transitioning between assays. A population-based study was performed in Calgary, Alberta, Canada of 4301 individuals who received testing from January 2012 to November 2015. In 2014, direct renin concentration replaced plasma renin activity in routine testing. We described the prevalence of primary aldosteronism in our population before the change and, using the assumption of disease prevalence stability, determined the corresponding ratio cutoffs after the introduction of the new assay. During the initial portion of the study (using plasma renin activity), 4.9% of those screened were classified as highly probable cases, whereas 10.4% were considered probable and 28.9% possible using locally validated cutoffs. Aldosterone:renin ratio cutoffs were then determined for the direct renin concentration assay. A highly probable case of primary aldosteronism corresponded to a cutoff of >100 pmol L
−1
mIU
−1
L
−1
with hypokalemia. A probable case corresponded to a cutoff of >100 and a possible case to >35 pmol L
−1
mIU
−1
L
−1
. In contrast, cutoffs derived using a conversion factor resulted in significantly higher cutoffs and the potential for missed cases. In conclusion, using large population data, historically consistent aldosterone:renin ratio cutoffs can be established when transitioning between assays. Population-derived cutoffs may be more appropriate for clinical use and less likely to result in false-negative classification than those obtained from conventional direct method comparisons.
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Affiliation(s)
- Alexander A. Leung
- From the Division of Endocrinology and Metabolism, Department of Medicine (A.A.L., G.A.K.) and Calgary Laboratory Services, Department of Pathology and Laboratory Medicine, Section of Clinical Biochemistry (D.J.O., A.C., H.S.), University of Calgary, Alberta, Canada
| | - Dennis J. Orton
- From the Division of Endocrinology and Metabolism, Department of Medicine (A.A.L., G.A.K.) and Calgary Laboratory Services, Department of Pathology and Laboratory Medicine, Section of Clinical Biochemistry (D.J.O., A.C., H.S.), University of Calgary, Alberta, Canada
| | - Alex Chin
- From the Division of Endocrinology and Metabolism, Department of Medicine (A.A.L., G.A.K.) and Calgary Laboratory Services, Department of Pathology and Laboratory Medicine, Section of Clinical Biochemistry (D.J.O., A.C., H.S.), University of Calgary, Alberta, Canada
| | - Hossein Sadrzadeh
- From the Division of Endocrinology and Metabolism, Department of Medicine (A.A.L., G.A.K.) and Calgary Laboratory Services, Department of Pathology and Laboratory Medicine, Section of Clinical Biochemistry (D.J.O., A.C., H.S.), University of Calgary, Alberta, Canada
| | - Gregory A. Kline
- From the Division of Endocrinology and Metabolism, Department of Medicine (A.A.L., G.A.K.) and Calgary Laboratory Services, Department of Pathology and Laboratory Medicine, Section of Clinical Biochemistry (D.J.O., A.C., H.S.), University of Calgary, Alberta, Canada
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18
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Jonsdottir G, Gudmundsson J, Birgisson G, Sigurjonsdottir HA. Primary aldosteronism: from case detection to histopathology with up to 6 years of follow-up. J Clin Hypertens (Greenwich) 2016; 19:424-430. [DOI: 10.1111/jch.12947] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 08/25/2016] [Accepted: 09/02/2016] [Indexed: 11/30/2022]
Affiliation(s)
| | - Jon Gudmundsson
- Division of Interventional Radiology; Department of Radiology; Landspitali University Hospital; Reykjavik Iceland
| | - Gudjon Birgisson
- Department of Surgery; Landspitali University Hospital; Reykjavik Iceland
| | - Helga Agusta Sigurjonsdottir
- Faculty of Medicine; University of Iceland; Reykjavik Iceland
- Division of Endocrinology; Department of Medicine; Landspitali University Hospital; Reykjavik Iceland
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19
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Leung AA, Nerenberg K, Daskalopoulou SS, McBrien K, Zarnke KB, Dasgupta K, Cloutier L, Gelfer M, Lamarre-Cliche M, Milot A, Bolli P, Tremblay G, McLean D, Tobe SW, Ruzicka M, Burns KD, Vallée M, Prasad GVR, Lebel M, Feldman RD, Selby P, Pipe A, Schiffrin EL, McFarlane PA, Oh P, Hegele RA, Khara M, Wilson TW, Penner SB, Burgess E, Herman RJ, Bacon SL, Rabkin SW, Gilbert RE, Campbell TS, Grover S, Honos G, Lindsay P, Hill MD, Coutts SB, Gubitz G, Campbell NRC, Moe GW, Howlett JG, Boulanger JM, Prebtani A, Larochelle P, Leiter LA, Jones C, Ogilvie RI, Woo V, Kaczorowski J, Trudeau L, Petrella RJ, Hiremath S, Drouin D, Lavoie KL, Hamet P, Fodor G, Grégoire JC, Lewanczuk R, Dresser GK, Sharma M, Reid D, Lear SA, Moullec G, Gupta M, Magee LA, Logan AG, Harris KC, Dionne J, Fournier A, Benoit G, Feber J, Poirier L, Padwal RS, Rabi DM. Hypertension Canada's 2016 Canadian Hypertension Education Program Guidelines for Blood Pressure Measurement, Diagnosis, Assessment of Risk, Prevention, and Treatment of Hypertension. Can J Cardiol 2016; 32:569-88. [PMID: 27118291 DOI: 10.1016/j.cjca.2016.02.066] [Citation(s) in RCA: 329] [Impact Index Per Article: 41.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 02/23/2016] [Accepted: 02/23/2016] [Indexed: 12/28/2022] Open
Abstract
Hypertension Canada's Canadian Hypertension Education Program Guidelines Task Force provides annually updated, evidence-based recommendations to guide the diagnosis, assessment, prevention, and treatment of hypertension. This year, we present 4 new recommendations, as well as revisions to 2 previous recommendations. In the diagnosis and assessment of hypertension, automated office blood pressure, taken without patient-health provider interaction, is now recommended as the preferred method of measuring in-office blood pressure. Also, although a serum lipid panel remains part of the routine laboratory testing for patients with hypertension, fasting and nonfasting collections are now considered acceptable. For individuals with secondary hypertension arising from primary hyperaldosteronism, adrenal vein sampling is recommended for those who are candidates for potential adrenalectomy. With respect to the treatment of hypertension, a new recommendation that has been added is for increasing dietary potassium to reduce blood pressure in those who are not at high risk for hyperkalemia. Furthermore, in selected high-risk patients, intensive blood pressure reduction to a target systolic blood pressure ≤ 120 mm Hg should be considered to decrease the risk of cardiovascular events. Finally, in hypertensive individuals with uncomplicated, stable angina pectoris, either a β-blocker or calcium channel blocker may be considered for initial therapy. The specific evidence and rationale underlying each of these recommendations are discussed. Hypertension Canada's Canadian Hypertension Education Program Guidelines Task Force will continue to provide annual updates.
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Affiliation(s)
- Alexander A Leung
- Division of Endocrinology and Metabolism, Department of Medicine, University of Calgary, Calgary, Alberta, Canada.
| | - Kara Nerenberg
- Department of Medicine and Department of Obstetrics and Gynecology, University of Calgary, Calgary, Alberta, Canada
| | - Stella S Daskalopoulou
- Divisions of General Internal Medicine, Clinical Epidemiology and Endocrinology, Department of Medicine, McGill University, McGill University Health Centre, Montreal, Quebec, Canada
| | - Kerry McBrien
- Departments of Family Medicine and Community Health Sciences, Institute for Public Health, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Kelly B Zarnke
- Division of General Internal Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Kaberi Dasgupta
- Divisions of General Internal Medicine, Clinical Epidemiology and Endocrinology, Department of Medicine, McGill University, McGill University Health Centre, Montreal, Quebec, Canada
| | - Lyne Cloutier
- Université du Québec à Trois-Rivières, Trois-Rivières, Quebec, Canada
| | - Mark Gelfer
- Department of Family Medicine, University of British Columbia, Copeman Healthcare Centre, Vancouver, British Columbia, Canada
| | - Maxime Lamarre-Cliche
- Institut de Recherches Cliniques de Montréal, Université de Montréal, Montréal, Quebec, Canada
| | - Alain Milot
- Department of Medicine, Université Laval, Québec, Quebec, Canada
| | - Peter Bolli
- Ambulatory Internal Medicine Teaching Clinic, St Catharines, Ontario, Canada
| | - Guy Tremblay
- CHU-Québec-Hopital St Sacrement, Québec, Quebec, Canada
| | - Donna McLean
- University of Alberta, Edmonton, Alberta, Canada
| | | | - Marcel Ruzicka
- Division of Nephrology, Department of Medicine, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Kevin D Burns
- Division of Nephrology, Department of Medicine, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Michel Vallée
- Hôpital Maisonneuve-Rosemont, Université de Montréal, Montréal, Quebec, Canada
| | | | - Marcel Lebel
- Department of Medicine, Université Laval, Québec, Quebec, Canada
| | - Ross D Feldman
- Discipline of Medicine, Memorial University of Newfoundland, St John's, Newfoundland and Labrador, Canada
| | - Peter Selby
- Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada
| | - Andrew Pipe
- University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Ernesto L Schiffrin
- Department of Medicine and Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montreal, Quebec, Canada
| | - Philip A McFarlane
- Division of Nephrology, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Paul Oh
- University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Robert A Hegele
- Departments of Medicine (Division of Endocrinology) and Biochemistry, Western University, London, Ontario, Canada
| | - Milan Khara
- Vancouver Coastal Health Addiction Services, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Thomas W Wilson
- Department of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - S Brian Penner
- Department of Internal Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Ellen Burgess
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Robert J Herman
- Division of General Internal Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Simon L Bacon
- Department of Exercise Science, Concordia University, and Montreal Behavioural Medicine Centre, Hôpital du Sacré-Coeur de Montréal, Montréal, Quebec, Canada
| | - Simon W Rabkin
- Vancouver Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Richard E Gilbert
- Division of Endocrinology, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Tavis S Campbell
- Department of Psychology, University of Calgary, Calgary, Alberta, Canada
| | - Steven Grover
- Division of Clinical Epidemiology, Montreal General Hospital, Montreal, Quebec, Canada
| | - George Honos
- University of Montreal, Montreal, Quebec, Canada
| | - Patrice Lindsay
- Best Practices and Performance, Heart and Stroke Foundation, Toronto, Ontario, Canada
| | - Michael D Hill
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Shelagh B Coutts
- Departments of Clinical Neurosciences and Radiology, Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Gord Gubitz
- Division of Neurology, Halifax Infirmary, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Norman R C Campbell
- Medicine, Community Health Sciences, Physiology and Pharmacology, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Gordon W Moe
- St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Jonathan G Howlett
- Departments of Medicine and Cardiac Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Jean-Martin Boulanger
- Charles LeMoyne Hospital Research Centre, Sherbrooke University, Sherbrooke, Quebec, Canada
| | | | - Pierre Larochelle
- Institut de Recherches Cliniques de Montréal, Université de Montréal, Montréal, Quebec, Canada
| | - Lawrence A Leiter
- Keenan Research Centre in the Li Ka Shing Knowledge Institute of St Michael's Hospital, and University of Toronto, Toronto, Ontario, Canada
| | - Charlotte Jones
- University of British Columbia, Vancouver, British Columbia, Canada
| | - Richard I Ogilvie
- University Health Network, Departments of Medicine and Pharmacology, University of Toronto, Toronto, Ontario, Canada
| | - Vincent Woo
- University of Manitoba, Winnipeg, Manitoba, Canada
| | | | - Luc Trudeau
- Division of Internal Medicine, McGill University, Montréal, Quebec, Canada
| | - Robert J Petrella
- Department of Family Medicine, Western University, London, Ontario, Canada
| | - Swapnil Hiremath
- Faculty of Medicine, University of Ottawa, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Denis Drouin
- Faculty of Medicine, Université Laval, Québec, Quebec, Canada
| | - Kim L Lavoie
- Department of Psychology, University of Quebec at Montreal (UQAM), Montréal, Quebec, Canada
| | - Pavel Hamet
- Faculté de Médicine, Université de Montréal, Montréal, Quebec, Canada
| | - George Fodor
- University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Jean C Grégoire
- Université de Montréal, Institut de cardiologie de Montréal, Montréal, Quebec, Canada
| | | | - George K Dresser
- Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Mukul Sharma
- The Canadian Stroke Network, Ottawa, Ontario, Canada
| | - Debra Reid
- Canadian Forces Health Services, Department of National Defence and Dietitians of Canada, Ottawa, Ontario, Canada
| | - Scott A Lear
- Faculty of Health Sciences, Simon Fraser University, Vancouver, British Columbia
| | - Gregory Moullec
- Research Center, Hôpital du Sacré-Coeur de Montréal, Public Health School, University of Montréal, Montréal, Quebec, Canada
| | - Milan Gupta
- University of Toronto, Toronto, Ontario, Canada; McMaster University, Hamilton, Ontario, Canada
| | - Laura A Magee
- St George's, University of London, London, United Kingdom
| | | | - Kevin C Harris
- Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Janis Dionne
- Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Anne Fournier
- Service de cardiologie, Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, Montréal, Quebec, Canada
| | - Geneviève Benoit
- Service de néphrologie, Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, Montréal, Quebec, Canada
| | - Janusz Feber
- Division of Neurology, Department of Pediatrics, Children's Hospital of Eastern Ontario, University of Ottawa, Ottawa, Ontario, Canada
| | - Luc Poirier
- Centre Hospitalier Universitaire de Québec et Faculté de Pharmacie, Université Laval, Québec, Quebec, Canada
| | - Raj S Padwal
- Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Doreen M Rabi
- Departments of Medicine, Community Health and Cardiac Sciences, University of Calgary, Calgary, Alberta, Canada
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Doumas M, Douma S. Primary Aldosteronism: A Field on the Move. UPDATES IN HYPERTENSION AND CARDIOVASCULAR PROTECTION 2016. [DOI: 10.1007/978-3-319-34141-5_2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Kline GA, Chin A, So B, Harvey A, Pasieka JL. Defining contralateral adrenal suppression in primary aldosteronism: implications for diagnosis and outcome. Clin Endocrinol (Oxf) 2015; 83:20-7. [PMID: 25400021 DOI: 10.1111/cen.12669] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 09/08/2014] [Accepted: 11/10/2014] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Unilateral primary aldosteronism (PA) should have a contralaterally normal and therefore suppressed adrenal zona glomerulosa. However, there is no validated definition of adrenal suppression. We created two biochemical hypotheses of adrenal suppression based upon measurements taken during adrenal vein sampling (AVS) to determine whether either proved useful for interpretation of AVS or prediction of hypertension outcome in operated cases. DESIGN Retrospective database analysis. PATIENTS Ninety-nine cases of PA from a tertiary hypertension unit. MEASUREMENTS Hypothesis 1 was the proportional suppression of the uninvolved/lowest adrenal(aldo/cortisol) to IVC(aldo/cortisol) ratio pre- and post cosyntropin. Hypothesis 2 was the absolute decrease in the uninvolved adrenal(aldo/cortisol) ratio after cortrosyn injection. ROC analysis performed using lateralization and hypertension resolution as the outcomes of interest. RESULTS Hypothesis 1 proved highly predictive of lateralization with a ROC AUC of 0.958, P < 0.0001, giving adrenal(aldo/cortisol):IVC(aldo/cortisol) <1.4 as the optimized criterion (sensitivity 90%, specificity 94%). For blood pressure outcomes in the surgical subgroup (n = 52), hypertension resolution was most commonly seen among subjects with adrenal suppression by both definitions although there was significant overlap with subjects requiring ongoing medication. CONCLUSIONS Post cosyntropin suppression of the uninvolved adrenal-to-IVC ratio is a highly useful definition of adrenal suppression that accurately predicts unilateral PA. This may be particularly useful in a case where AVS fails to catheterize one of the adrenal veins but suppression is seen on the other side. Adrenal suppression may also predict blood pressure outcome, however, a much larger PA database is likely necessary to determine the relative contribution of this predictor.
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Affiliation(s)
- G A Kline
- Division of Endocrinology, Department of Medicine, University of Calgary, Calgary, AB, Canada
| | - A Chin
- Section of Clinical Biochemistry, Calgary Laboratory Services, Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, AB, Canada
| | - B So
- Department of Radiology, University of Calgary, Calgary, AB, Canada
| | - A Harvey
- Department of Surgery, University of Calgary, Calgary, AB, Canada
| | - J L Pasieka
- Department of Surgery, University of Calgary, Calgary, AB, Canada
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22
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Adrenal Vein Sampling for Conn's Syndrome: Diagnosis and Clinical Outcomes. Diagnostics (Basel) 2015; 5:254-71. [PMID: 26854152 PMCID: PMC4665593 DOI: 10.3390/diagnostics5020254] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 05/06/2015] [Accepted: 06/03/2015] [Indexed: 11/30/2022] Open
Abstract
Adrenal vein sampling (AVS) is the gold standard test to determine unilateral causes of primary aldosteronism (PA). We have retrospectively characterized our experience with AVS including concordance of AVS results and imaging, and describe the approach for the PA patient in whom bilateral AVS is unsuccessful. We reviewed the medical records of 85 patients with PA and compared patients who were treated medically and surgically on pre-procedure presentation and post-treatment outcomes, and evaluated how technically unsuccessful AVS results were used in further patient management. Out of the 92 AVS performed in 85 patients, AVS was technically successful bilaterally in 58 (63%) of cases. Either unsuccessful AVS prompted a repeat AVS, or results from the contralateral side and from CT imaging were used to guide further therapy. Patients who were managed surgically with adrenalectomy had higher initial blood pressure and lower potassium levels compared with patients who were managed medically. Adrenalectomy results in significantly decreased blood pressure and normalization of potassium levels. AVS can identify surgically curable causes of PA, but can be technically challenging. When one adrenal vein fails to be cannulated, results from the contralateral vein can be useful in conjunction with imaging and clinical findings to suggest further management.
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Barigou M, Ah-Kang F, Orloff E, Amar J, Chamontin B, Bouhanick B. Effect of postural changes on aldosterone to plasma renin ratio in patients with suspected secondary hypertension. Ann Cardiol Angeiol (Paris) 2015; 64:169-174. [PMID: 26051856 DOI: 10.1016/j.ancard.2015.04.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Accepted: 04/28/2015] [Indexed: 06/04/2023]
Abstract
AIMS To study the influence of postural changes on aldosterone to renin ratio (ARR) in patients with suspected secondary hypertension and to evaluate the sensitivity and specificity of the recommended seated ARR compared to supine and upright ARR for primary aldosteronism screening. METHODS Fifty-three hypertensive patients were prospectively hospitalized for secondary hypertension exploration (age: 51 ± 12, 66% males). After withdrawal of drugs interfering with renin angiotensin system, plasma aldosterone and direct renin concentration were measured in the morning, at bed after an overnight supine position, then out of bed after 1 hour of upright position and finally 2 hours later after 15 minutes of seating. Minimal renin value was set at 5 μUI/mL. RESULTS Referring to ARR cut-off of 23 pg/μUI, the sensitivity of seated ARR was 57.1% and specificity was 92.3%. The negative and positive predictive values were 95.1% and 45.2% respectively. Compared to these results, a cut-off of 19 improved sensitivity to 85.7% with a specificity of 89.7%. Negative and positive predictive values were 98.3% and 41.1% respectively. Seated ARR mean value was lower than supine and upright ARR mean values, due to an overall increase in renin at seating compared to the supine position by factor 1.9 while aldosterone just slightly increased by factor 1.2. Seated ARR correlated to supine and upright ARR: correlation coefficients (r) 0.90 and 0.93 respectively (P<0.001). CONCLUSIONS Current recommended measurement of ARR in the seating position is fairly correlated to supine and upright ARR. A suggested cut-off value of 19 instead of 23 pg/μUI increased the discriminating power of this test.
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Affiliation(s)
- M Barigou
- Pôle cardiovasculaire et métabolique, service de médecine interne et hypertension artérielle, hôpital Rangueil, 1, avenue du Professeur-Jean-Poulhès, TSA 50032, 31059 Toulouse cedex 9, France.
| | - F Ah-Kang
- Pôle cardiovasculaire et métabolique, service de médecine interne et hypertension artérielle, hôpital Rangueil, 1, avenue du Professeur-Jean-Poulhès, TSA 50032, 31059 Toulouse cedex 9, France
| | - E Orloff
- Pôle cardiovasculaire et métabolique, service de médecine interne et hypertension artérielle, hôpital Rangueil, 1, avenue du Professeur-Jean-Poulhès, TSA 50032, 31059 Toulouse cedex 9, France
| | - J Amar
- Pôle cardiovasculaire et métabolique, service de médecine interne et hypertension artérielle, hôpital Rangueil, 1, avenue du Professeur-Jean-Poulhès, TSA 50032, 31059 Toulouse cedex 9, France
| | - B Chamontin
- Pôle cardiovasculaire et métabolique, service de médecine interne et hypertension artérielle, hôpital Rangueil, 1, avenue du Professeur-Jean-Poulhès, TSA 50032, 31059 Toulouse cedex 9, France
| | - B Bouhanick
- Pôle cardiovasculaire et métabolique, service de médecine interne et hypertension artérielle, hôpital Rangueil, 1, avenue du Professeur-Jean-Poulhès, TSA 50032, 31059 Toulouse cedex 9, France
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24
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Kline GA. Primary Aldosteronism: unnecessary complexity in definition and diagnosis as a barrier to wider clinical care. Clin Endocrinol (Oxf) 2015; 82:779-84. [PMID: 25891981 DOI: 10.1111/cen.12798] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 02/18/2015] [Indexed: 11/26/2022]
Affiliation(s)
- Gregory A Kline
- Department of Medicine, University of Calgary, Calgary, AB, Canada
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25
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Doumas M, Athyros V, Papademetriou V. Screening for Primary Aldosteronism: Whom and How? J Clin Hypertens (Greenwich) 2015; 17:547-8. [DOI: 10.1111/jch.12521] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Doumas
- 2nd Propedeutic Department of Internal Medicine; Aristotle University; Thessaloniki Greece
- George Washington University; Washington DC
| | - Vasilios Athyros
- 2nd Propedeutic Department of Internal Medicine; Aristotle University; Thessaloniki Greece
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26
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Rye P, Chin A, Pasieka J, So B, Harvey A, Kline G. Unadjusted Plasma Renin Activity as a "First-Look" Test to Decide Upon Further Investigations for Primary Aldosteronism. J Clin Hypertens (Greenwich) 2015; 17:541-6. [PMID: 25756935 DOI: 10.1111/jch.12523] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 12/19/2014] [Accepted: 12/20/2014] [Indexed: 11/27/2022]
Abstract
The authors sought to define the 95th percentile of plasma renin activity (PRA) in a sample of patients with confirmed primary aldosteronism (PA) prior to adjustment of medications as a practical "first-look" test to identify those with very low ultimate likelihood of having PA. The aldosterone to renin ratio (ARR) was measured without adjustment of antihypertensive medications, with further workup as appropriate. Two groups were defined: patients with surgically "confirmed PA" (n=58) and patients with "high-probability PA" (n=59), defined as having any of the following: computed tomography-confirmed adrenal adenoma plus lateralizing adrenal vein sampling (AVS) without surgery, high ARR and hypokalemia but nonlateralizing AVS, or ARR more than four times the upper limit of normal. The PRA 95th percentile was 1.0 ng/mL/h. All outliers had hypokalemia and two had adrenal adenomas. There was no difference between the confirmed and high probability groups. In the absence of highly suspicious clinical features, patients with unadjusted PRA >1.0 ng/mL/h do not warrant further investigation for PA.
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Affiliation(s)
- Peter Rye
- Department of Medicine, University of Calgary, Calgary, AB
| | - Alex Chin
- Calgary Laboratory Services, Department of Pathology and Laboratory Medicine, Section of Clinical Biochemistry, University of Calgary, Calgary, AB
| | - Janice Pasieka
- Department of Surgery, University of Calgary, Calgary, AB
| | - Benny So
- Department of Radiology, University of Calgary, Calgary, AB
| | - Adrian Harvey
- Department of Surgery, University of Calgary, Calgary, AB
| | - Gregory Kline
- Interim Division Head of Endocrinology, University of Calgary, Calgary, AB
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27
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Venos ES, So B, Dias VC, Harvey A, Pasieka JL, Kline GA. A clinical prediction score for diagnosing unilateral primary aldosteronism may not be generalizable. BMC Endocr Disord 2014; 14:94. [PMID: 25495254 PMCID: PMC4320464 DOI: 10.1186/1472-6823-14-94] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 12/08/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND A published clinical prediction score indicated that a unilateral adrenal adenoma and either hypokalemia or an estimated glomerular filtration rate of 100 ml/min/1.73 m2 was 100% specific for unilateral primary aldosteronism. This study aimed to validate this score in a separate cohort of patients with primary aldosteronism. METHODS A review of patients with primary aldosteronism from June 2005 to July 2013 at a single center's hypertension clinic. One hundred twelve patients with primary aldosteronism underwent successful adrenal vein sampling and the 110 patients with full data available were included in the final analysis. Adrenal vein sampling was performed all patients desiring surgery by the simultaneous collection of sample prior to and 15 minutes after a cosyntropin infusion with a 3:1 aldosterone/cortisol ratio diagnosing unilateral primary aldosteronism. The derived score was applied to the cohort. Sensitivity and specificity were calculated for clinical prediction score of ≥5 points. RESULTS There were 64 patients found to have unilateral primary aldosteronism and 48 had bilateral disease. A score ≥5 points had 64% sensitivity (95% confidence interval, 51-76) and 85% specificity (95% confidence interval, 71-94) for unilateral disease. Four patients had lateralization of primary aldosteronism to the side contralateral to the adenoma. CONCLUSIONS The 100% specificity of the score for the unilateral origin of primary aldosteronism was not validated in this cohort with a score of ≥5 points. At best, a high score in this prediction rule may be an additional tool for helping to confirm a decision to offer patients adrenal vein sampling.
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Affiliation(s)
- Erik S Venos
- />Division of Endocrinology, Faculty of Medicine, University of Calgary, 1820 Richmond Road SW, Calgary, AB T2T 5C7 Canada
| | - Benny So
- />Department of Radiology, University of Calgary, Calgary, AB Canada
| | - Valerian C Dias
- />Division of Clinical Pathology, University of Calgary, Calgary, AB Canada
| | - Adrian Harvey
- />Department of Surgery, University of Calgary, Calgary, AB Canada
| | - Janice L Pasieka
- />Department of Surgery, University of Calgary, Calgary, AB Canada
| | - Gregory A Kline
- />Division of Endocrinology, Faculty of Medicine, University of Calgary, 1820 Richmond Road SW, Calgary, AB T2T 5C7 Canada
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28
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Osher E, Marcus Y, Stern N. A Single-Step Approach to the Diagnosis of Primary Hyperaldosteronism: Filling a True Void or Burdening the Bottleneck of Adrenal Vein Sampling? J Clin Hypertens (Greenwich) 2014; 16:477-8. [DOI: 10.1111/jch.12343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Etty Osher
- The Institute of Endocrinology, Metabolism and Hypertension; Tel Aviv-Sourasky Medical Center and Sackler Faculty of Medicine; Tel Aviv University; Tel Aviv Israel
| | - Yonit Marcus
- The Institute of Endocrinology, Metabolism and Hypertension; Tel Aviv-Sourasky Medical Center and Sackler Faculty of Medicine; Tel Aviv University; Tel Aviv Israel
| | - Naftali Stern
- The Institute of Endocrinology, Metabolism and Hypertension; Tel Aviv-Sourasky Medical Center and Sackler Faculty of Medicine; Tel Aviv University; Tel Aviv Israel
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