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Search Results: 1 - 10 of 149561 matches for " Hygriv B. Rao "
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Catheter Ablation of Fascicular Ventricular Tachycardia
Ramprakash B,Jaishankar S,Hygriv B. Rao,Narasimhan C
Indian Pacing and Electrophysiology Journal , 2008,
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.
Ventricular Dyssynchrony Patterns in Left Bundle Branch Block, With and Without Heart Failure
Hygriv B Rao,Raghu Krishnaswami,Sharada Kalavakolanu,Narasimhan Calambur
Indian Pacing and Electrophysiology Journal , 2010,
Abstract: Background: Assessment of ventricular dyssynchrony in patients with heart failure is used for selecting candidates for cardiac resynchronization therapy (CRT). The patterns of regional distribution of dyssynchrony in a population with LBBB with and without heart failure have not been well delineated. This aspect forms the object of the study.Methods: Tissue Doppler Imaging (TDI) data of consecutive patients with heart failure and LBBB (Group A) was compared with those with LBBB and normal LV function (Group B). All patients had standard 2D-echocardigraphic examination and TDI. Tissue velocity curves obtained by placing sample volumes in opposing basal and mid segments of septal, lateral, inferior, anterior and posterior walls were analyzed. Inter ventricular dyssynchrony (IVD) was assessed by the difference between aortic and pulmonary pre ejection intervals. LV dyssynchrony (LVD) was assessed by the difference in times to peak velocity. A delay of ≥ 40 msec was considered significant for presence of IVD and LVD.Results: There were 103 patients in Group A and 25 in Group B. The mean QRS duration and PR intervals respectively were 146 ± 25 vs. 152±20 msec and 182± 47 vs. 165±36 msec. (p=NS) LVEF in the 2 groups were (32 ± 6 % vs. 61± 11%; p< 0.01). Prevalence of dyssynchrony in the HF group compared to Group B was 72% vs. 16%, (P<0.01). Lateral wall dyssynchrony in the 2 groups was 37% vs. 0% (p< 0.01) while septal dyssynchrony was 16% vs. 16% (p- NS).Conclusions: 72% of heart failure patients with LBBB have documented dyssynchrony on TDI, which has a heterogeneous regional distribution. Dyssynchrony may be seen in LBBB and normal hearts but it is does not involve the lateral wall. Septal dyssynchrony in heart failure patients may not have the same significance as lateral wall delay.
Substrate Based Ablation of Ventricular Tachycardia Through An Epicardial Approach
Aman Makhija,Ajit Thachil,C Sridevi,B Hygriv Rao
Indian Pacing and Electrophysiology Journal , 2009,
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.
Successful Catheter Ablation of Persistent Electrical Storm late Post Myocardial Infarction by Targeting Purkinje Arborization Triggers
Paul S Thoppil,B Hygriv Rao,S Jaishankar,Calambur Narasimhan
Indian Pacing and Electrophysiology Journal , 2008,
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.
Current Perspectives: Rheumatic Atrial Fibrillation
Narasimhan C,Bhima shankar P.R,Hygriv Roa B,Jaishankar S
Journal of Atrial Fibrillation , 2010, DOI: 10.4022/jafib.v1i11.562
Abstract: AF is a common arrhythmia associated with large burden of morbidity and mortality. In areas with a high prevalence of rheumatic heart disease, valve disease is the most common substrate for the occurrence of AF and this problem assumes greater importance because the resulting escalation in morbidity and mortality involves relatively younger population. As is true of the general population, the prevalence of AF in patients with rheumatic mitral valve disease (RMVD) increases with advancing age.
Argon laser therapy in open angle glaucoma
Rao B
Indian Journal of Ophthalmology , 1983,
Abstract:
Oguchi′s disease and night blindness
Rao B
Indian Journal of Ophthalmology , 1977,
Abstract:
Clinical evaluation of the non-contact tonometer and comparison with goldmann applanation tonometer
Rao B
Indian Journal of Ophthalmology , 1984,
Abstract:
A case of bilateral vitreous haemorrhage following snake bite
Rao B
Indian Journal of Ophthalmology , 1977,
Abstract:
Presidential address
Rao B
Indian Journal of Dermatology, Venereology and Leprology , 1991,
Abstract:
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