Effect of Sodium-Glucose Co-transporter-2 Inhibitors on Ventricular Repolarization Markers in Heart Failure with Reduced Ejection Fraction

BACKGROUND AND AIM

Sodium-glucose co-transporter-2 (SGLT2) inhibitors added to optimal medical therapy have been shown to reduce the risk of cardiovascular death and recurrent heart failure (HF) hospitalization in HF patients. We aimed to evaluate the effect of SGLT2 inhibitors on the ventricular repolarization markers (VRM) in patients with HF with reduced ejection fraction (HFrEF).

METHODS

51 patients with HFrEF who had symptoms New York Heart Association (NYHA) class II-IV despite optimal medical treatment and were added SGLT2 inhibitors to their treatment were included in the study. Electrocardiography (ECG) and laboratory results obtained before the treatment and at the first-month follow-up visit were compared. QT, QTc (corrected by Bazett formula), QT dispersion (QTd), QTc dispersion (QTc-d), Tpeak to Tend (Tp-e) interval, Tp-e/QT, and Tp-e/QTc ratios were measured and defined as VRM.

RESULTS

A significant decrease was observed in HR, QT, QTc intervals, and QTd compared to pre-treatment. While the mean Tp-e interval was 101.5 ± 11.7 ms before treatment, it decreased to 93.1 ± 12.7 ms after treatment (p < 0.001). There was a significant decrease in N-terminal pro-B-type natriuretic peptide (NT-proBNP) levels after treatment [2859 ± 681vs.1266 ± 763, respectively (p < 0.001)] and QTd, Tp-e interval, and Tp-e/QTc ratio was positively correlated with the change in NT-proBNP level.

CONCLUSIONS

The addition of SGLT2 inhibitors to optimal medical therapy in HFrEF patients positively changes VRM (QT, QTc, QTd, Tp-e, and Tp-e/QTc).

Incidence and Predictors of Left Ventricular Thrombus Formation After Acute Myocardial Infarction With ST-Segment Elevation

Background and objective Our prospective study aimed to evaluate the frequency and risk factors of left ventricular thrombus (LVT) occurring after acute ST-segment elevation myocardial infarction (STEMI) in the era of primary percutaneous coronary intervention (PCI). Methods Our study included 131 patients diagnosed with acute STEMI who were followed up and treated. The presence of the thrombus was determined by transthoracic echocardiography (TTE). Study patients were evaluated as cases of thrombus (+) and thrombus (-). The relationship of electrocardiographic measurements such as the number of leads with pathological Q waves, ST segment deviation score, QT dispersion, and echocardiographic measurements such as ejection fraction (EF), end-systolic and end-diastolic volumes, and wall motion score index (WMSI) with LVT was investigated. LVT risk factors were identified. Results The median age of the study patients was 59.7 ± 11.7 years, and 84.7% were male. The incidence of LVT was 17.6% (23 patients). While the anterior STEMI rate was 86.9% in the thrombus (+) group, it was 50.9% in the thrombus (-) group (p<0.001). While WMSI was 2.1 ± 0.44 in the thrombus (+) group, it was calculated as 1.40 ± 0.31 in the thrombus (-) group (p<0.001). In the thrombus (+) group, EF was found to be lower, end-systolic and end-diastolic volumes were higher, and the rate of moderate and severe mitral regurgitation and the rate of aneurysmatic segment detection were higher. LVT had a moderate correlation with WMSI (r: 0.613; p<0.001), the presence of an aneurysmatic segment (r: 0.549; p<0.001), and EF (r: -0.514; p<0.001). Presentation with anterior STEMI (odds ratio [OR]: 4.266; p<0.001), WMSI (OR: 7.971; p=0.012), the number of leads with pathological Q waves detected at discharge (OR: 3.651; p=0.009), the presence of an aneurysmatic segment (OR: 2.089, p=0.009), and EF (OR: 1.129, p=0.006) were identified as independent risk factors of the presence of LVT. The area under the curve for WMSI was found to be 0.910 (95% CI: 0.852-0.968). A WMSI cut-off of 1.56 identified LVT with 91% sensitivity and 70% specificity (Youden index: 0.617). Conclusion In the primary PCI era, LVT incidence after acute STEMI is still significant. Anterior STEMI, the number of leads with pathological Q waves detected at discharge, WMSI, aneurysm formation, and low EF are independent risk factors for LVT. Among these risk factors, the variable with the highest diagnostic power is WMSI.

A New Marker for Determining Cardiovascular Risk: Salusin Alpha

Background and objective Prevention of atherosclerotic cardiovascular diseases (ASCVD) is possible with early recognition of individuals at risk. Salusin alpha is an endogenous bioactive peptide with anti-atherogenic properties. We aimed to reveal the relationship between salusin alpha levels and cardiovascular (CV) risk using the Systematic COronary Risk Estimation 2 (SCORE2) and Pooled Cohort Equation (PCE) algorithms. Methods A total of 137 asymptomatic outpatients were included in the study. The participants were divided into four quartile groups according to the distribution of salusin alpha levels: Q1 (n = 34), Q2 (n = 35), Q3 (n = 34), and Q4 (n = 34). The relationships of salusin alpha with cardiovascular risk scores and groups were investigated. Results The means of SCORE2 and PCE risk scores (11.24 ± 1.24 and 13.30 ± 1.71, respectively; p < 0.001 for both), baseline scores in the presence of SCORE2 and PCE optimal risk factors (4.82 ± 0.71 (p = 0.034); 4.20 ± 0.77 (p = 0.010)), and means of Δ SCORE2 and Δ PCE risk score (6.41 ± 0.67 and 9.10 ± 1.10, respectively; p < 0.001 for both) were significantly higher in the Q1 group. The SCORE2 "very high" cardiovascular (CV) risk group was significantly represented in the Q1 group (n = 17 (50%)), while the "low-moderate" risk group was more heavily represented in the Q4 group (n = 15 (44.1%)) (p < 0.001). The PCE "high" CV risk group was significantly represented in the Q1 group (n = 9 (26.5%)), while the "low" risk group was more intensely represented in the Q4 group (n = 20 (58.8%)) (p < 0.001). Salusin alpha had a significantly negative moderate correlation with SCORE2 and PCE risk scores. As a result of receiver operating characteristic (ROC) analysis, it was found that salusin alpha had significant diagnostic power in the prediction of CV risk groups determined by SCORE2 and PCE risk scores. Salusin alpha was observed to be a risk-reducing factor in SCORE2 and PCE CV risk groups (odds ratio (OR) (95% confidence interval (CI)): 0.989 (0.982-0.997) (p = 0.002) and OR (95% CI): 0.988 (0.978-0.998) (p = 0.009) respectively). Conclusion Salusin alpha has a negative correlation with SCORE2 and PCE risk scores. It has significant diagnostic power in the prediction of CV risk groups and is an independent variable that has a risk-reducing effect in the distribution of risk groups.

The Predictive Value of the Left Atrial Kinetic Energy for Atrial Fibrillation Recurrence

Background and aim

Determining which patients will experience recurrence of atrial fibrillation (AF) is crucial for treatment modification. This study aimed to investigate the predictive value of left atrial kinetic energy (LAKE) in AF recurrence.

Materials and methods

A total of 120 consecutive patients who achieved sinus rhythm (SR) with electrical direct current cardioversion and met the inclusion criteria were included in the study. Transthoracic echocardiography (TTE) and LAKE values were calculated on the first day after cardioversion. Rhythm control was performed with 12-lead electrocardiography in the first-month follow-up.

Results

While 81 (67.5%) patients were in SR at one month, AF recurrence was detected in 39 (32.5%) patients. In the AF group, AF duration, cardioversion energy, number of diabetic patients, left atrium (LA) diameter, LA pre-mitral A wave volume, LA minimum volume, and pulmonary artery pressure values were significantly higher than in the SR group, while mitral A wave velocity and LAKE values were significantly lower. In multivariate regression analysis, AF duration (OR: 1.54; 95% CI: 1.22 - 1.93; p < 0.001), LA diameter (OR: 1.33; 95% CI: 1.10 - 1.61; p = 0.002), and LAKE (OR: 0.96; 95% CI: 0.94 - 0.99; p = 0.007) were determined to be independent predictors of AF recurrence at one month.

Conclusions

LA diameter, AF duration, and LAKE were found to be significant predictors of AF recurrence after cardioversion.

Frequency of fragmented QRS on ECG and relationship with left ventricular dysfunction in patients with subclinical hypothyroidism

OBJECTIVE

Subclinical hypothyroidism (SH) is a biochemical definition that has been proven to be associated with cardiovascular diseases. Fragmented QRS (fQRS) is defined as an electrocardiographic (ECG) reflection of cardiac fibrosis. It is associated with increased cardiovascular mortality and morbidity. In this study, we aim to evaluate the presence and frequency of fQRS in SH patients and determine the relationship between fQRS presence and left ventricular dysfunction by using the myocardial performance index (MPI).

PATIENTS AND METHODS

Our study included 50 newly diagnosed SH and 50 healthy participants with similar demographic characteristics. We compared demographic characteristics, laboratory findings, electrocardiographic and echocardiographic measurements of the study population. SH patients were evaluated as two groups in the subgroup analysis: [fQRS(+) SH] with fQRS and [fQRS(-) SH] without fQRS. We analyzed the correlation of thyroidstimulating hormone (TSH) levels with demographic characteristics, electrocardiographic and echocardiographic data. Independent predictors of fQRS presence were evaluated by logistic regression analysis.

RESULTS

The mean age of SH patients was 44 ± 8 years, and 46% (n = 23) of the patients were women. In the control group, the mean age was 45 ± 11 years, and 52% (n = 26) of the participants were women. MPI was found to be significantly higher in the SH group compared to the control group (0.53 ± 0.07 vs. 0.41 ± 0.08, p< 0.001). fQRS was found to be significantly higher in the SH group compared to the control group (p= 0.004). In echocardiographic measurements, isovolumic relaxation time (IVRT) was found to be significantly longer in the fQRS(+) SH group (105.6 ± 21.8 ms vs. 91.1 ± 24.4 ms, p < 0.001), while isovolumic contraction time (IVCT) was not significantly different between the groups. Ejection time (ET) was significantly longer in the fQRS (-) SH group (286.9 ± 32.1 ms vs. 274.2 ± 30.6 ms; p = 0.011). MPI was 0.57 ± 0.12 in the fQRS (+) SH group and 0.48 ± 0.06 in the fQRS (-) SH group, which was significantly higher (p = 0.001). TSH was found to be 8.82 ± 4.58 in fQRS (+) SH group and 5.73 ± 3.10 in fQRS (-) SH group (p = 0.003). It was found that MPI (r = 0.302, p < 0.001) and fQRS (r = 0.321, p < 0.001) were significantly positively correlated with TSH. TSH levels [OR = 1,645, 95% CI = 1,322 to 2,067 (p = 0.001)], IVRT [OR = 1,502, 95% CI = 1,119 to 95% (p = 0.003)], and MPI [OR = 1,408, 95% CI = 0.989 - 1.806 (p = 0.001)] were found to be independent predictors of the presence of fQRS.

CONCLUSIONS

The frequency of fQRS in SH patients was found to be higher than in the healthy population. MPI values were higher in fQRS (+) SH patients compared to fQRS (-) SH patients, resulting indirectly having a higher risk of tendency to left ventricular systolic/diastolic dysfunction. MPI and fQRS had a significant positive correlation with TSH. TSH, IVRT, and MPI were found to be independent predictors of the presence of fQRS in SH patients.

A New Perspective for Isolated Coronary Artery Ectasia: Cystatin C

Introduction

The pathophysiology of isolated coronary artery ectasia (iCAE) has not been clearly identified, although multiple abnormalities, including arteritis, endothelial dysfunction, and vascular destruction, have been reported. In this study, we aimed to analyze serum cystatin C concentrations in patients with iCAE and controls.

Methods

Forty-seven patients with iCAE (mean age: 55.9 ± 11.5) and 32 individuals with normal coronary angiography (mean age: 57.8.1 ± 9.6) were included in the study. Plasma cystatin C levels were measured by using the principle of particle-enhanced turbidimetric immunoassay (PETIA).

Results

Serum cystatin C concentrations were significantly lower in patients with iCAE compared with the control group (0.98 ± 0.17 mg/L versus 1.17 ± 2.6 mg/L, p-value = 0.001). A significantly positive relationship was found between serum cystatin C levels and creatinine and high-sensitivity C-reactive protein (hs-CRP) levels in both groups (r-value = 0.288, p-value = 0.005, r-value = 0.143, p-value = 0.007, respectively). In multivariate logistic regression analysis, serum cystatin C level found to be a significant predictor for the presence of iCAE (OR: 0.837, CI: 95% (0.341 - 1.637), p-value = 0.013). Receiver operating characteristic (ROC) analysis determined that a cystatin C value < 1.02 mg/L had a sensitivity of 56% and a specificity of 78% for the prediction of ectasia.

Conclusion

We conclude that cystatin C independently can be a useful predictor for the presence of iCAE.

Percutaneous transcatheter closure of ruptured sinus of Valsalva aneurysm

Sinus of Valsalva aneurysms are rare congenital anomalies. Sinus of Valsalva aneurysm rupture, leads to biventricular failure due to systemic to pulmonary shunting. Surgical repair has been the traditional treatment for these aneurysms. Recently, percutaneous treatment has been successfully performed to selected patients. We present a 36-year-old man who had ruptured sinus of Valsalva aneurysm, that was successfully treated with using a catheter-based approach with the patent ductus arteriosus occluder device.

Axillary artery as alternative access for transcatheter aortic valve implantation in a patient with thoracic and abdominal multilayer flow modulator stents, and in a patient with occluded bilateral carotid and iliac arteries

Transaxillary access is an alternative to femoral access in patients with iliofemoral occlusion for transcatheter aortic valve implantation (TAVI). A Multilayer Flow Modulator (MLFM) stent is frequently used in patients with a complex thoracic and abdominal aortic aneurysm. The MLFM stent is particularly used in cases where large arteries, such as the renal or celiac artery, feed from the aneurysmal sac. To the best of our knowledge, there is no prior report in the literature of a TAVI case with a pre-existing MLFM stent. Presently described are 2 TAVI cases, one with thoracoabdominal MLFM stents, and the second with occluded bilateral carotid and iliac arteries.

A pulmonary arteriovenous malformation treated with percutaneous intervention

A pulmonary arteriovenous malformation (PAVM) is a rare anomaly that may have significant clinical complications. PAVMs are commonly seen in patients with hereditary hemorrhagic telangiectasia, while some 10% of PAVMs may be idiopathic. PAVMs can cause cyanosis, fatigue, polycythemia, and paradoxical thromboembolic complications. The diagnosis and treatment of a PAVM should be performed with great care, as the disorder may be fatal if not properly treated. Percutaneous closure (such as embolization) can be very beneficial. Presently described is the case of a 23-year-old man with an idiopathic PAVM who was treated percutaneously with 3 vascular plugs.

An alternative treatment for iatrogenic right ventricular puncture in primary percutaneous intervention

Right ventricle perforation is an uncommon, but potentially fatal, possible complication of pericardiocentesis. We presented a case of right ventricular perforation that developed during urgent pericardiocentesis due to tamponade. This case was successfully treated with the incremental removal of the drainage catheter, replacing it with a smaller catheter at 10-minute intervals. This may be an alternative option to treat iatrogenic right ventricle puncture occurring during pericardiocentesis without cardiac surgery or a vascular closure device.