1
|
Pifer P, Jaishankar S, Bhargava R, Keller A, Musunuru H, Cohen M, Sukumvanich P, Courtney-Brooks M, Boisen M, Berger J, Taylor S, Olawaiye A, Lesnock J, Edwards R, Vargo J, Beriwal S. PD-0913 Is substantial LVSI prognostic in patients with pathological lymph node-negative endometrial cancer? Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)02992-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
2
|
Jaishankar S, Pifer PM, Bhargava R, Keller A, Musunuru HB, Patel AK, Sukumvanich P, Boisen M, Berger JL, Taylor S, Courtney-Brooks M, Olawaiye A, Lesnock J, Edwards R, Vargo JA, Beriwal S. Is Substantial Lymphovascular Space Invasion Prognostic for Clinical Outcomes in Type II Endometrial Cancer? Clin Oncol (R Coll Radiol) 2022; 34:452-458. [PMID: 35264314 DOI: 10.1016/j.clon.2022.02.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/26/2022] [Accepted: 02/21/2022] [Indexed: 11/03/2022]
Abstract
AIMS Substantial lymphovascular space invasion (LVSI) compared with none or focal LVSI is predictive of lymph node involvement and worse clinical outcomes in endometrioid-type endometrial carcinoma. We aimed to quantify the incidence of substantial LVSI in type II (clear cell and serous) endometrial cancer and correlate the extent of LVSI with clinical outcomes. MATERIALS AND METHODS A retrospective review was conducted on type II endometrial cancer patients who underwent surgical management from July 2017 to December 2019 using the three-tier LVSI scoring system. Binary logistic regression and Cox regression were used to analyse predictors of lymph node involvement or survival outcomes, respectively. The Kaplan-Meier method and Log-rank test were used to analyse differences in locoregional disease-free survival (LR-DFS), distant metastasis disease-free survival (DM-DFS) and overall survival between patients with substantial versus none/focal LVSI. RESULTS In 79 patients with type II endometrial carcinoma, no LVSI, focal LVSI and substantial LVSI was present in 48.1%, 15.2% and 36.7% of patients, respectively. Lymph nodes were involved in 0.0% with no LVSI, 20.0% with focal LVSI and 60.0% with substantial LVSI (P < 0.001). The median follow-up was 22.2 months. In patients with none/focal versus substantial LVSI, the 2-year LR-DFS and DM-DFS rates were 91.5% versus 71.4% (P = 0.01) and 90.2% versus 63.8% (P = 0.005), respectively. On univariate analysis, myometrial invasion ≥50%, tumour size ≥3.6 cm, substantial versus none/focal LVSI, lymph node involvement and omission of adjuvant radiotherapy were significant predictors for worse LR-DFS and DM-DFS (P < 0.05). DISCUSSION Substantial LVSI has a high incidence in type II pathology at our institution and predicts for lymph node involvement and worse clinical outcomes.
Collapse
Affiliation(s)
- S Jaishankar
- Department of Radiation Oncology, UPMC Hillman Cancer Center, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - P M Pifer
- Department of Radiation Oncology, UPMC Hillman Cancer Center, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - R Bhargava
- Department of Pathology, Magee-Women's Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - A Keller
- Department of Radiation Oncology, UPMC Hillman Cancer Center, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - H B Musunuru
- Department of Radiation Oncology, UPMC Hillman Cancer Center, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - A K Patel
- Division of Radiation Oncology, Allegheny Health Network Cancer Institute, Pittsburgh, PA, USA
| | - P Sukumvanich
- Department of Gynecologic Oncology, Magee-Women's Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - M Boisen
- Department of Gynecologic Oncology, Magee-Women's Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - J L Berger
- Department of Gynecologic Oncology, Magee-Women's Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - S Taylor
- Department of Gynecologic Oncology, Magee-Women's Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - M Courtney-Brooks
- Department of Gynecologic Oncology, Magee-Women's Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - A Olawaiye
- Department of Gynecologic Oncology, Magee-Women's Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - J Lesnock
- Department of Gynecologic Oncology, Magee-Women's Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - R Edwards
- Department of Gynecologic Oncology, Magee-Women's Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - J A Vargo
- Department of Radiation Oncology, UPMC Hillman Cancer Center, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - S Beriwal
- Division of Radiation Oncology, Allegheny Health Network Cancer Institute, Pittsburgh, PA, USA; Varian Medical Systems, Charlottesville, VA, USA.
| |
Collapse
|
3
|
Karuppannan AK, Ramesh A, Reddy YK, Ramesh S, Mahaprabhu R, Jaisree S, Roy P, Sridhar R, Pazhanivel N, Sakthivelan SM, Sreekumar C, Murugan M, Jaishankar S, Gopi H, Purushothaman V, Kumanan K, Babu M. Emergence of Porcine Circovirus 2 Associated Reproductive Failure in Southern India. Transbound Emerg Dis 2014; 63:314-20. [DOI: 10.1111/tbed.12276] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Indexed: 11/26/2022]
Affiliation(s)
- A. K. Karuppannan
- Centralized University Laboratory; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
- Vaccine Research Centre for Viral Vaccines; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - A. Ramesh
- Vaccine Research Centre for Viral Vaccines; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - Y. K. Reddy
- Vaccine Research Centre for Viral Vaccines; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - S. Ramesh
- Central Instrumentation Laboratory; Madras Veterinary College; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - R. Mahaprabhu
- Centralized University Laboratory; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - S. Jaisree
- Centralized University Laboratory; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - P. Roy
- Centralized University Laboratory; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - R. Sridhar
- Department of Pathology; Madras Veterinary College; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - N. Pazhanivel
- Department of Pathology; Madras Veterinary College; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - S. M. Sakthivelan
- Department of Pathology; Madras Veterinary College; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - C. Sreekumar
- Post Graduate Research Institute in Animal Sciences; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - M. Murugan
- Post Graduate Research Institute in Animal Sciences; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - S. Jaishankar
- Post Graduate Research Institute in Animal Sciences; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - H. Gopi
- Post Graduate Research Institute in Animal Sciences; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - V. Purushothaman
- Centre for Animal Health Studies; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - K. Kumanan
- Centre for Animal Production Studies; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| | - M. Babu
- Centre for Animal Production Studies; Tamil Nadu Veterinary and Animal Sciences University; Chennai India
| |
Collapse
|
4
|
Abstract
Four neonates presented within 24 hours of birth with stridor, respiratory distress and a weak cry. Clinical examination of the cardiovascular system revealed no abnormality. The transthoracic echocardiogram showed large aneurysm of ductus arteriosus at the aortic isthmus, tapering to a small tortuous channel at the site of pulmonary artery insertion. Computerized tomography scan performed in two of the neonates demonstrated considerable compression of adjacent thoracic structures. One required surgical excision due to persistence of symptoms. Serial echocardiograms in the remaining three babies showed transition through various stages of resolution over a period of 6 weeks to 3 months, resulting in the obliteration of the aneurysm. All babies are doing well during the follow-up.
Collapse
Affiliation(s)
- Nageswara R Koneti
- Department of Pediatric Cardiology, CARE Institute of Medical Sciences, Hyderabad, India
| | | | | | | |
Collapse
|
5
|
Bhima Shankar PR, Hygriv Rao B, Jaishankar S, Narasimhan C. Substrate map based electrical isolation of an apical aneursym--a strategy for ablation in ischemic scar ventricular tachycardia. Indian Heart J 2010; 62:346-347. [PMID: 21280478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Affiliation(s)
- P R Bhima Shankar
- Division of Electrophysiology, CARE Hospital, The Institute of Medical Sciences, Hyderabad, India
| | | | | | | |
Collapse
|
6
|
Shankar PRB, Muralidharan TR, Jaishankar S, Michaud G, Calambur N. Succesful radiofrequency ablation of atrial tachycardia arising from within the coronary venous sinus. Indian Pacing Electrophysiol J 2010; 10:228-32. [PMID: 20473374 PMCID: PMC2862404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Affiliation(s)
- PR Bhima Shankar
- Division of Electrophysiology, Department of Cardiology, CARE Hospitals and CARE Foundation, Hyderabad, India
| | - TR Muralidharan
- Department of Cardiology, Sri Ramachandra Medical College and Research Institute, Chennai
| | - S Jaishankar
- Division of Electrophysiology, Department of Cardiology, CARE Hospitals and CARE Foundation, Hyderabad, India
| | - Gregory Michaud
- Cardiac Arrhythmia Section, Cardiovascular Division, Brigham and Women's Hospital, and Harvard Medical School, Boston, Massachusetts
| | - Narasimhan Calambur
- Division of Electrophysiology, Department of Cardiology, CARE Hospitals and CARE Foundation, Hyderabad, India
| |
Collapse
|
7
|
Shankar P R B, Roa B H, Jaishankar S, Narasimhan M. Current Perspectives: Rheumatic Atrial Fibrillation. J Atr Fibrillation 2010; 2:222. [PMID: 28496650 DOI: 10.4022/jafib.222] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2009] [Revised: 12/31/2009] [Accepted: 01/24/2010] [Indexed: 11/10/2022]
Affiliation(s)
- Bhima Shankar P R
- Division of Electrophysiology, Department of Cardiology, CARE Hospitals and CARE Foundation, Hyderabad, India
| | - Hygriv Roa B
- Division of Electrophysiology, Department of Cardiology, CARE Hospitals and CARE Foundation, Hyderabad, India
| | - S Jaishankar
- Division of Electrophysiology, Department of Cardiology, CARE Hospitals and CARE Foundation, Hyderabad, India
| | - M Narasimhan
- Division of Electrophysiology, Department of Cardiology, CARE Hospitals and CARE Foundation, Hyderabad, India
| |
Collapse
|
8
|
Makhija A, Thachil A, Sridevi C, Rao BH, Jaishankar S, Narasimhan C. Substrate based ablation of ventricular tachycardia through an epicardial approach. Indian Pacing Electrophysiol J 2009; 9:364-9. [PMID: 19898661 PMCID: PMC2766586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Ventricular tachycardia (VT) occurring late after myocardial infarction is often due to reentry circuit in the peri-infarct zone. The circuit is usually located in the sub-endocardium, though subepicardial substrates are known. Activation mapping during VT to identify target regions for ablation can be difficult if VT is non inducible or poorly tolerated. In the latter, a substrate based approach of mapping during sinus rhythm in conjunction with pace mapping helps to define the reentry circuit and select target sites for ablation in majority of patients with hemodynamically unstable VT. Percutaneous epicardial catheter ablation has been attempted as an approach where ablation by a conventional endocardial access has been unsuccessful. We report a case of post myocardial infarction scar VT which could be successfully ablated with a substrate based approach from the epicardial aspect.
Collapse
Affiliation(s)
- Aman Makhija
- Fellow Electrophysiology, CARE Hospital, Institute of Medical Sciences, Hyderabad, India
| | - Ajit Thachil
- Fellow Electrophysiology, CARE Hospital, Institute of Medical Sciences, Hyderabad, India
| | - C Sridevi
- Consultant Electrophysiologist & Sr Cardiologist, CARE Hospital, Institute of Medical Sciences, Hyderabad, India
| | - B Hygriv Rao
- Consultant Electrophysiologist & Sr Cardiologist, CARE Hospital, Institute of Medical Sciences, Hyderabad, India
| | - S Jaishankar
- Consultant Electrophysiologist & Sr Cardiologist, CARE Hospital, Institute of Medical Sciences, Hyderabad, India
| | - Calambur Narasimhan
- Director Electrophysiology & Pacing, CARE Hospital, Institute of Medical Sciences, Hyderabad, India
| |
Collapse
|
9
|
Thoppil PS, Rao BH, Jaishankar S, Narasimhan C. Successful catheter ablation of persistent electrical storm late post myocardial infarction by targeting purkinje arborization triggers. Indian Pacing Electrophysiol J 2008; 8:298-303. [PMID: 18982139 PMCID: PMC2572020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Drug refractory ventricular tachycardia (VT) occurring as a storm after acute myocardial infarction has grave prognosis. We report a case of a middle-aged lady who presented with drug refractory VT that lead to persistent electrical storm two weeks after an anterior wall myocardial infarction. She underwent a successful catheter ablation of VT followed a few days later by implantation of an AICD. Catheter ablation of the VT could control the persistent electrical storm and the patient was free from a recurrence of VT at three month follow up.
Collapse
|
10
|
Ramprakash B, Jaishankar S, Rao HB, Narasimhan C. Catheter ablation of fascicular ventricular tachycardia. Indian Pacing Electrophysiol J 2008; 8:193-202. [PMID: 18679520 PMCID: PMC2490803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
Fascicular ventricular tachycardia (VT) is an idiopathic VT with right bundle branch block morphology and left-axis deviation occuring predominantly in young males. Fascicular tachycardia has been classified into three subtypes namely, left posterior fascicular VT, left anterior fascicular VT and upper septal fascicular VT. The mechanism of this tachycardia is believed to be localized reentry close to the fascicle of the left bundle branch. The reentrant circuit is composed of a verapamil sensitive zone, activated antegradely during tachycardia and the fast conduction Purkinje fibers activated retrogradely during tachycardia recorded as the pre Purkinje and the Purkinje potentials respectively. Catheter ablation is the preferred choice of therapy in patients with fascicular VT. Ablation is carried out during tachycardia, using conventional mapping techniques in majority of the patients, while three dimensional mapping and sinus rhythm ablation is reserved for patients with nonmappable tachycardia.
Collapse
|
11
|
Jaishankar S, Warrier M, Deshpande S. Neutral transport baffling studies for SST-1. Fusion Engineering and Design 2002. [DOI: 10.1016/s0920-3796(02)00054-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
12
|
Rao CV, Raghu K, Sharada K, Jaishankar S. Absent coronary venous sinus: a rare anomaly. Indian Heart J 2001; 53:352-3. [PMID: 11516041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023] Open
Abstract
A 42-year-old man, presenting with dyspnea on exertion and ST segment depression on treadmill test, was found to have absent coronary venous sinus on coronary angiography. We report this case of isolated congenital absence of coronary venous sinus because of its rarity.
Collapse
Affiliation(s)
- C V Rao
- Department of Cardiology, Nizam's Institute of Medical Sciences, Hyderabad
| | | | | | | |
Collapse
|
13
|
Abstract
In approximately 85% of Ewing sarcomas, chromosomal translocations give rise to the chimeric gene EWS/FLI, encoding the N-terminus of the RNA binding protein EWS fused to the DNA-binding domain of the ETS protein FLI-1. EWS/FLI is a stronger transcriptional activator than wild-type FLI-1, although both proteins bind to the same DNA sequences in vitro. In addition, EWS/FLI, but not FLI-1, is a transforming oncogene in NIH3T3 fibroblasts. EWS/FLI is thought to transform through its ability to deregulate the expression of target genes. We introduced several point mutations into the ETS domain of EWS/FLI that abolished DNA-binding activity. Although two of these mutations disrupted the transforming activity of EWS/FLI, one mutated protein containing a substitution of isoleucine 347 with glutamic acid (I347E) retained diminished transforming activity. In addition, EWS/FLI I347E did not activate expression of the endogenous EWS/FLI target gene manic fringe (MFNG). These studies demonstrate that a portion of the oncogenic activity of EWS/FLI is independent of FLI DNA-binding activity.
Collapse
Affiliation(s)
- S Jaishankar
- Department of Developmental Neurobiology, St Jude Children's Research Hospital, Memphis, Tennessee, TN 38105, USA
| | | | | | | |
Collapse
|
14
|
Kumar PR, Padmanabhan TN, Jiwani PA, Rao DS, Jaishankar S. Acute myocardial infarction in tetralogy of Fallot. Indian Heart J 1998; 50:329-31. [PMID: 9753858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Affiliation(s)
- P R Kumar
- Department of Cardiology, Nizam's Institute of Medical Sciences, Hyderabad
| | | | | | | | | |
Collapse
|
15
|
Kumar PR, Rao CV, Padmanabhan TN, Rao DS, Jaishankar S. Unruptured sinus of Valsalva aneurysm dissecting into ventricular septum: diagnosis by echocardiography. Indian Heart J 1998; 50:209-12. [PMID: 9622993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
- P R Kumar
- Department of Cardiology, Nizam's Institute of Medical Sciences, Hyderabad
| | | | | | | | | |
Collapse
|
16
|
Raghu C, Rao PP, Kumar AV, Kapardhi PL, Rao DS, Kumar PV, Jaishankar S. Safety of thrombolytic therapy following acute myocardial infarction in patients above 65 years. Indian Heart J 1998; 50:163-6. [PMID: 9622982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The safety of thrombolytic therapy for acute myocardial infarction in the elderly population has not been clearly established. In a retrospective study we evaluated the efficacy and complications of thrombolytic therapy in the elderly as compared to younger patients. Consecutive 588 patients who received thrombolytic therapy were studied. Clinical data in 136 patients aged above 65 years were compared with 85 patients below 40 years. Cigarette smoking was a common risk factor in the young (46 vs 13; p < 0.0001). Coexistent systemic diseases and conduction system disturbances (28 vs 9; p < 0.05) were common in the older patients, but the incidence of bleeding complications to thrombolytic therapy (6 vs 1; p = NS) was not found to be higher. Ninety percent of the elderly who had cardiogenic shock died. There was no significant difference between the two groups in reinfarction rate (12 vs 15; p = NS) and post-infarct angina (20 vs 20; p = NS). Coronary angiography revealed a higher incidence of multivessel disease in the elderly. To conclude, thrombolytic therapy is safe and effective even in older individuals.
Collapse
Affiliation(s)
- C Raghu
- Department of Cardiology, Nizam's Institute of Medical Sciences, Hyderabad
| | | | | | | | | | | | | |
Collapse
|
17
|
Premchand RK, Allam VK, Padmanabhan TN, Mullapudi VR, Jaishankar S. Anomalous origin of left anterior descending coronary artery from pulmonary artery in addition to anomalous origin of left circumflex coronary artery from right aortic sinus--a case report. Indian Heart J 1998; 50:77-9. [PMID: 9583294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
- R K Premchand
- Department of Cardiology, Nizam's Institute of Medical Sciences, Hyderabad
| | | | | | | | | |
Collapse
|
18
|
Kumar PR, Rao DS, Jaishankar S. Spontaneous dissection of coronary artery causing anterior myocardial infarction in a young man. Indian Heart J 1996; 48:699-700. [PMID: 9062022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Affiliation(s)
- P R Kumar
- Department of Cardiology, Nizam's Institute of Medical Sciences, Hyderabad
| | | | | |
Collapse
|
19
|
Allam VK, Jaishankar S. Closed Mitral Valvotomy. Asian Cardiovasc Thorac Ann 1996. [DOI: 10.1177/021849239600400120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Vasantha Kumar Allam
- Department of Cardiology Nizam's Institute of Medical Sciences Panjagutta, Hyderabad 500082, India
| | - S. Jaishankar
- Department of Cardiology Nizam's Institute of Medical Sciences Panjagutta, Hyderabad 500082, India
| |
Collapse
|
20
|
Kumaresan K, Singh S, Jaishankar S, Raju BS. Semi-quantitative planar scintigraphy using thallium 201 for detection and localization of coronary artery disease: correlation with coronary angiography. Indian Heart J 1992; 44:33-8. [PMID: 1398693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Thallium 201 exercise redistribution planar myocardial perfusion scan using semiquantitative technique was performed in 80 symptomatic patients undergoing coronary angiography. Out of the 240 vessels studied by angiography, more than 70% luminal narrowing was detected in 87 vessels, borderline stenosis was found in 49 arteries and the remaining 104 vessels were normal. Thallium scan correctly identified the significant stenosis in 76 vessels and the absence of stenosis in 102 vessels. In addition, perfusion abnormality was found in relation with 21 vessels of borderline stenosis. The sensitivity and specificity of Thallium scan were estimated as 92% and 95% for left anterior descending artery (LAD), 79% and 98% for left circumflex artery (LCX), 88% and 100% for right coronary artery (RCA) and 87% and 98% for all coronary arteries combined together (ACA).
Collapse
Affiliation(s)
- K Kumaresan
- Department of Nuclear Medicine & Cardiology, Nizam's Institute of Medical Sciences, Hyderabad
| | | | | | | |
Collapse
|
21
|
Kapashi KA, Singh S, Raju R, Jaishankar S, Raju AR, Raju BS. Morphometric analysis of coronary lesions in patients with unstable angina--an arteriographic study. Indian Heart J 1991; 43:165-70. [PMID: 1800301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
In 100 patients with unstable angina and 50 patients with stable angina qualitative morphology of coronary artery lesions were compared by angiography. The mean age of the patients was 51 years. In the unstable angina group, 50 patients had rest angina, 32 had crescendo angina and 18 had denovo angina; 31 patients had single vessel disease, 33 had two vessel disease, 34 had triple vessel disease and 2 had left main disease. 'Angina-producing' artery could be identified in 90 out of 100 patients. Ten totally occluded vessels were excluded from analysis. Lesions causing diameter stenosis of greater than 50% could be categorised to one of the following groups: a) Concentric stenosis (18 vessels), b) Type I eccentric lesion (asymmetric narrowing with smooth borders and broad neck--20 vessels), c) Type II eccentric lesion (asymmetric narrowing with narrow neck and overhanging irregular edges--47 vessels), and d) Multiple irregularities (15 vessels). Lesions in 9 vessels showed an associated thrombus. It appears that Type II eccentric lesions are frequent in patients with unstable angina; they probably represent ruptured atherosclerotic plaque or partially occlusive thrombi or both.
Collapse
Affiliation(s)
- K A Kapashi
- Nizam's Institute of Medical Sciences, Hyderabad
| | | | | | | | | | | |
Collapse
|
22
|
Sethi KK, Balachandar J, Jaishankar S, Gupta MP. Differential effects of autonomic blockade on sinus and atrioventricular nodal function in normals and in intrinsic sinus node dysfunction. Int J Cardiol 1986; 12:233-42. [PMID: 3744602 DOI: 10.1016/0167-5273(86)90246-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The effect of pharmacologic total autonomic blockade on sinus and atrioventricular nodes was studied in 10 normals and 21 patients with sick sinus syndrome with abnormal intrinsic corrected sinus node recovery time. In normals the intrinsic heart rate (113.3 +/- 11.6 beats/min) was higher than the resting heart rate (87.3 +/- 12 beats/min; P less than 0.001). The AH interval at an identical paced rate decreased from 119 +/- 36 msec to 93 +/- 17.6 msec after autonomic blockade (P less than 0.05). Mean atrial paced cycle length at AH Wenckebach block was not different during control and after drugs (319 +/- 46 msec vs. 311.5 +/- 39 msec; P = NS). Although sinus cycle length shortened in all cases after autonomic blockade, paced cycle length at AH Wenckebach increased (4) or remained unchanged (3) in 7 cases. Maximum normal "intrinsic" paced cycle length at AH Wenckebach was 390 msec (mean +/- 2 SD). In sick sinus syndrome, resting heart rate (66.3 +/- 18.8 beats/min) and intrinsic heart rate (74.6 +/- 16.4 beats/min) were similar (P = NS); AH at identical paced rate: control 136.6 +/- 54 msec, after drugs 130.5 +/- 35 msec (P = NS); cycle length at AH Wenckebach: control 380.5 +/- 73 msec, after autonomic blockade 383 +/- 49 msec (P = NS). Two of 3 cases with abnormal atrioventricular nodal response to atrial pacing during control normalized after autonomic blockade; 9/21 (42.8%) cases developed AH Wenckebach at cycle length greater than 390 msec after autonomic blockade. The data suggest that the autonomic nervous system has differential effects on sinus and atrioventricular nodes. Patients with sick sinus syndrome frequently have abnormalities of "intrinsic" atrioventricular nodal conduction unmasked by autonomic blockade.
Collapse
|
23
|
Abstract
In two patients with Wolff-Parkinson-White syndrome, we observed the unusual coexistence of functional Mahaim and accessory atrioventricular pathways. In the first patient, three types of reciprocating tachycardia were demonstrable: (1) anterograde conduction over the atrioventricular (AV) node with right bundle branch block (RBBB) and retrograde conduction via a right-sided atrioventricular accessory pathway; (2) anterograde conduction through the AV node with RBBB and retrograde conduction via two (right-sided and septal) anomalous pathways; and (3) anterograde conduction through nodoventricular fibers and retrograde conduction over a right-sided accessory pathway. In the second patient the reentry circuit was comprised of AV node fasciculoventricular fiber in an anterograde direction and a right-sided accessory pathway in a retrograde direction. We believe this to be the first report of triple accessory pathways, consisting of two atrioventricular and one nodoventricular connection, demonstrated by intracardiac electrophysiologic study.
Collapse
|
24
|
Sethi KK, Jaishankar S, Gupta MP. Salutary effects of intravenous ajmaline in patients with paroxysmal supraventricular tachycardia mediated by dual atrioventricular nodal pathways: blockade of the retrograde fast pathway. Circulation 1984; 70:876-83. [PMID: 6488500 DOI: 10.1161/01.cir.70.5.876] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Electrophysiologic effects of 50 mg iv ajmaline were evaluated in 10 patients with atrioventricular nodal reentrant paroxysmal supraventricular tachycardia (PSVT) utilizing the slow pathway for antegrade and the fast pathway for retrograde conduction. Ajmaline terminated the PSVT in all 10 patients in 17 to 165 sec (mean 94 +/- 49 sec): by ventriculoatrial block in eight, AH block in one, and intra-atrial reentry in one patient. The predrug mean PSVT cycle length of 289 +/- 44 msec (range 240 to 350) increased significantly to 373.5 +/- 60 msec (range 263 to 464; p less than .01) before the tachycardia was terminated. The increase in cycle length was a function of both AH and HA prolongation. In all 10 patients ajmaline depressed conduction through the retrograde fast pathway, as evidenced by the increase in mean ventricular paced cycle length producing ventriculoatrial block from less than or equal to 280 +/- 40 to 438 +/- 93 msec (p less than .001), and the increase in the effective refractory period of the ventriculoatrial conduction system from less than or equal to 241 +/- 42 to less than or equal to 298 +/- 62 msec (p less than .05); the drug abolished ventriculoatrial conduction in four cases. The effective refractory period of the antegrade fast pathway was unchanged after ajmaline (less than or equal to 281 +/- 31 vs less than or equal to 275 +/- 38 msec; p = NS), but conduction through the antegrade slow pathway was depressed (atrial paced cycle length producing AH block 269 +/- 30 msec before and 312 +/- 44 msec after drug; p less than .05).(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
|
25
|
Abstract
Electrophysiologic studies were performed in 10 normals and 33 patients with sick sinus syndrome before and after total autonomic blockade with propranolol and atropine. In normals both corrected sinus node recovery time (SNRT) and sinoatrial conduction time (SACT) decreased significantly after autonomic blockade. In patients with sick sinus syndrome the corrected SNRT was abnormal (greater than 450 msec) in 16 (48.5%) cases before and 25 (76%) cases (greater than 285 msec) after autonomic ablation (P less than 0.02). Thirteen of 21 patients (62%) with normal intrinsic heart rate and all 12 cases with abnormally low intrinsic rate after autonomic blockade had abnormal corrected SNRT (greater than 285 msec). Mean SACT measured in 19 patients also shortened significantly following pharmacologic denervation. During control it was prolonged (greater than 226 msec) in 8 patients (44%). After autonomic blockade 2 of 13 patients with normal intrinsic heart rate and 3 of 6 with low intrinsic rate showed abnormal SACT (greater than 151 msec). The data suggest that the majority (76%) of patients with sick sinus syndrome have intrinsic abnormality of sinus node automaticity while in a minority (24%) disturbed autonomic regulation is the pathogenetic mechanism. Patients with normal intrinsic heart rate usually have normal intrinsic SACT, while a significant proportion of those with low intrinsic rate have abnormal perinodal conduction. Subjects with abnormal intrinsic heart rate have more severe disturbances of sinus node function than those with normal intrinsic rate.
Collapse
|
26
|
Sethi KK, Jaishankar S, Khalilullah M, Gupta MP. Selective blockade of retrograde fast pathway by intravenous disopyramide in paroxysmal supraventricular tachycardia mediated by dual atrioventricular nodal pathways. Br Heart J 1983; 49:532-43. [PMID: 6849716 PMCID: PMC481346 DOI: 10.1136/hrt.49.6.532] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Electrophysiological effects of 2 to 2.5 mg/kg iv disopyramide were studied in 10 patients with dual nodal pathways who used a slow pathway for anterograde and a fast pathway for retrograde conduction during paroxysmal supraventricular tachycardia (mean cycle length 308.5 +/- 37 ms; range 260-370 ms). Disopyramide terminated the tachycardia in six cases by production of ventriculoatrial block in five and by sinus overdrive in one. In the remaining four patients cycle length of the paroxysmal supraventricular tachycardia increased significantly from 270 +/- 8 ms to 377.5 +/- 28 ms. In all 10 patients disopyramide depressed retrograde fast pathway conduction manifest by an increase in mean ventricular paced cycle length producing ventriculoatrial block from less than or equal to 296.5 +/- 25 ms to 358 +/- 60 ms, and increase in retrograde fast pathway effective refractory period from less than or equal to 246 +/- 34 ms to 325 +/- 36 ms; the drug abolished ventriculoatrial conduction in two cases. Anterograde slow pathway and fast pathway conduction properties were unchanged after disopyramide (atrial paced cycle length producing AH block 292 +/- 30 to 306.5 +/- 30 ms; effective refractory period of anterograde fast pathway less than or equal to 274 +/- 56 to 284 +/- 44 ms, before and after the drug, respectively) suggesting that anterograde conduction was not crucial either for sustainment or for failure to initiate paroxysmal supraventricular tachycardia after the drug. Paroxysmal supraventricular tachycardia could not be reinduced in six cases after disopyramide. In the other four the ventricular paced cycle lengths producing ventriculoatrial block (318 +/- 41 ms) and effective refractory period of retrograde fast pathway (320 +/- 28 ms) were shorter than the cycle length of reinduced paroxysmal supraventricular tachycardia (367.5 +/- 35 ms) allowing perpetuation of the tachycardia. We conclude that disopyramide breaks atrioventricular nodal re-entrant tachycardia by specific blockade of the retrograde fast pathway though the effect on anterograde atrioventricular nodal conduction is variable.
Collapse
|
27
|
Jaishankar S, Sethi KK, Khalilullah M, Gupta R. Retrograde atrial preexcitation by programmed ventricular extrastimulation in paroxysmal supraventricular tachycardia mediated by concealed bypass tracts. Indian Heart J 1982; 34:138-45. [PMID: 7129490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
|
28
|
Jaishankar S, Sethi KK, Arora R, Gupta MP. Torsade de pointes--salutary effect of phentolamine in an isoproterenol resistant case. Indian Heart J 1982; 34:99-102. [PMID: 7118151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
|
29
|
Khalilullah M, Jaishankar S, Sethi KK, Singhal NK. Paroxysmal supraventricular tachycardia. Role of His bundle electrography and electrical pacing. Indian Heart J 1980; 32:271-8. [PMID: 7239544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
|