Browsing by Author "Nair, KKM"

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    A Case of Rheumatic Fibrinous Pericarditis
    (CIRCULATION-CARDIOVASCULAR IMAGING, 2016) Nair, KKM; Ganapathi, S; Sivadasanpillai, H; Sivasubramanian, S; Valaparambil, A; Tharakan, J
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    Arterial Discordance in Cardiac Tamponade
    (JOURNAL OF INVASIVE CARDIOLOGY, 2016) Nair, KKM; Gopalakrishnan, A; Ganapathi, S; Sivadasanpillai, H; Valaparambil, A; Tharakan, J
    Ventricular interdependence is a salient hemodynamic feature of cardiac tamponade that manifests as discordance between the left and right ventricles in filling and ejection on hemodynamic assessment. Ventricular interdependence can manifest as arterial discordance at the level of the great arteries.
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    BALLOON MITRAL VALVOTOMY FOR PATIENTS WITH MITRAL STENOSIS IN ATRIAL FIBRILLATION: IMMEDIATE AND LONG-TERM RESULTS
    (JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY, 2011) Nair, KKM; Sivadasanpillai, H; Thajudeen, A; Tharakan, JM; Titus, T; Valaparambil, A; Sivasubramonian, S; Mahadevan, KK; Namboodiri, N; Sasidharan, B; Ganapathy, S
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    Comparative study on safety, efficacy, and midterm results of balloon mitral valvotomy performed with triple lumen and double lumen mitral valvotomy catheters
    (Cardiovasc Interv., 2012-11) Nair, KKM; Pillai, H S; Thajudeen, A; Tharakan, J; Titus, T; Valaparambil, A; Sivasubramonian, S; Mahadevan, KK; Namboodiri, N; Sasidharan, B; Ganapathi, S
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    Comparative Study on Safety, Efficacy, and Midterm Results of Balloon Mitral Valvotomy Performed With Triple Lumen and Double Lumen Mitral Valvotomy Catheters
    (CATHETERIZATION AND CARDIOVASCULAR INTERVENTIONS, 2012) Nair, KKM; Pillai, HS; Thajudeen, A; Tharakan, J; Titus, T; Valaparambil, A; Sivasubramonian, S; Mahadevan, KK; Namboodiri, N; Sasidharan, B; Ganapathi, S
    Background: The triple lumen Inoue balloon is routinely used for Balloon Mitral Valvotomy (BMV) in India. Its major limitation is the high cost. The double lumen Accura balloon is less expensive, making it an attractive alternative in the developing countries. The study was meant to assess the safety, efficacy and midterm results of Accura balloon with respect to the Inoue balloon. Patients and Methods: 816 consecutive patients, who underwent elective BMV in this Institute from 1997 to 2003, were included in the study. The data of 487 patients who underwent BMV with Accura balloon was compared with 329 patients who underwent BMV with Inoue balloon. The clinical, echocardiographic, and hemodynamic data of these patients were analyzed retrospectively to assess the safety and efficacy of Accura balloon with respect to the Inoue balloon. Results: Immediate procedural success (93.9% in Inoue group and 91.6% in Accura group p. NS) and complications (6.6% in Inoue group and 5.6% in Accura group p. NS) were comparable between the study groups. The two study population had similar restenosis rate and events at 1 year after BMV. Both balloons could be reused multiple times without compromising on the safety and effectiveness. Accura balloons were less costly than Inoue balloon. The reusability with Accura was slightly more and found to be more cost-effective. Conclusions: Both Accura and Inoue balloon mitral valvotomy balloons are effective in providing relief from hemodynamically significant mitral stenosis in terms of gain in valve area and reduction in trans mitral gradient. Both groups have similar procedural success and complication rates, restenosis, and follow-up events at 1 year. Both balloons could be reused multiple times and Accura balloon is found to be more cost effective. (C) 2012 Wiley Periodicals Inc.
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    Deleterious effects of isolated right ventricular pacing in right ventricular myocardial infarction
    (INTERNATIONAL JOURNAL OF CARDIOLOGY, 2016) Gopalakrishnan, A; Sanjay, G; Nair, KKM; Harikrishnan, S; Valaparambil, A
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    ECG Challenge: Single or Double Tachycardia?
    (PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY, 2016) Nair, KKM; Thajudeen, A; Namboodiri, N; Valaparambil, A; Tharakan, J
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    Image of the month: Alternating bifid pulse - a novel manifestation of low cardiac output states
    (CLINICAL MEDICINE, 2016) Nair, KKM; Gopalakrishnan, A; Inamdar, SA; Ganapathi, S; Sivadasanpillai, H; Sivasubramonian, S; Valaparambil, A; Tharakan, J
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    Immediate and Long-term Results Following Balloon Mitral Valvotomy in Patients With Atrial Fibrillation
    (CLINICAL CARDIOLOGY, 2012) Nair, KKM; Pillai, HS; Thajudeen, A; Krishnamoorthy, KM; Sivasubramonian, S; Namboodiri, N; Sasidharan, B; Ganapathy, S; Varaparambil, A; Titus, T; Tharakan, J
    Background: The purpose of this study was to examine the influence of atrial fibrillation (AF) on the immediate and long-term outcome of patients undergoing balloon mitral valvotomy (BMV). Hypothesis: Patients with atrial fibrillation fair poorly after balloon mitral valvotomy. Methods: There were a total of 818 consecutive patients who underwent elective BMV in this institute from 1997 to 2003, with either double-lumen or triple-lumen BMV catheters included in the study. Of them, 95 were with AF. The clinical, echocardiographic, and hemodynamic data of these patients were compared with those of 723 patients in normal sinus rhythm (NSR). Immediate procedural results and long-term events were compared between the 2 study groups. Results: Patients with AF were older (39.9 +/- 9.9 years vs 29.4 +/- 10.1, P < 0.001) and presented more frequently with New York Heart Association (NYHA) class III-IV (53.7% vs 32.9%, P < 0.001), echocardiographic score >8 (47.4% vs 24.9%, P < 0.001), and with history of previous surgical commissurotomy (33.7% vs 11.5%, P < 0.001). In patients with AF, BMV resulted in inferior immediate and long-term outcomes, as reflected in a lesser post-BMV mitral valve area (1.3 +/- 0.4 vs 1.6 +/- 0.4 cm2, P = 0.032) and higher event rate on follow-up. Conclusions: Patients with AF were older, sicker, and had advanced rheumatic mitral valve disease. They had a higher incidence of stroke, new onset heart failure, and need for reinterventions on long-term follow-up. These patients need intense and more frequent follow-up. Clin. Cardiol. 2011 DOI: 10.1002/clc.22068 The authors have no funding, financial relationships, or conflicts of interest to disclose.
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    LBBB Tachycardia: What Is the Mechanism?
    (JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY, 2016) Nair, KKM; Namboodiri, N; Banavalikar, B; Valaparambil, A; Thajudeen, A; Tharakan, J
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    LBBB to RBBB Tachycardia: What Is the Mechanism?
    (JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY, 2016) Nair, KKM; Namboodiri, N; Valaparambil, A; Thajudeen, A; Tharakan, J
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    Malignant anomalous right coronary artery associated with mid-cavitary hypertrophic obstructive cardiomyopathy
    (POSTGRADUATE MEDICAL JOURNAL, 2016) Nair, KKM; Gopalakrishnan, A; Inamdar, SA; Valaparambil, A; Kapilamoorthy, TR; Tharakan, JA
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    Narrow QRS Tachycardia in a Patient with Tachycardiomyopathy: What Is the Mechanism?
    (PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY, 2016) Nair, KKM; Namboodiri, N; Divakaramenon, S; Banavalikar, B; Abhilash, SP; Thajudeen, A; Valaparambil, A
    A 50-year-old female presented with incessant palpitation of 2 weeks duration. She was hemodynamically stable and there was no evidence of heart failure. A transthoracic echocardiogram showed mild left ventricular (LV) dysfunction with LV ejection fraction of 45%. Electrocardiogram (12 lead and rhythm strip) was taken during the palpitation. What is the mechanism?
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    Narrow QRS Tachycardia with Long RP Interval: What Is the Mechanism?
    (PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY, 2016) Nair, KKM; Namboodiri, N; Thajudeen, A; Valaparambil, A; Tharakan, J
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    Narrow QRS Tachycardia With RR Alternans and 2:1 VA Relation
    (JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY, 2016) Nair, KKM; Namboodiri, N; Thajudeen, A; Patel, N; Valaparambil, A; Tharakan, J
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    Narrow QRS Tachycardia with RR Alternans: What Is the Mechanism?
    (PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY, 2016) Nair, KKM; Namboodiri, N; Banavalikar, B; Nallasivan, R; Valaparambil, A; Thajudeen, A; Tharakan, J
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    Narrow QRS Tachycardia with Spontaneous Switch. What Is the Mechanism?
    (PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY, 2016) Nair, KKM; Namboodiri, N; Banavalikar, B; Inamdar, S; Valaparambil, A; Thajudeen, A; Tharakan, J
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    Narrow QRS Tachycardia with Transition: What Is the Mechanism?
    (PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY, 2016) Nair, KKM; Namboodiri, N; Banavalikar, B; Inamdar, S; Valaparambil, A; Thajudeen, A; Tharakan, J
    A 50-year-old woman underwent radiofrequency catheter ablation of narrow QRS tachycardia that was terminated with intravenous adenosine. Twelve-lead electrocardiogram was normal during sinus rhythm. The electrophysiological study showed normal atriohisian and hisioventricular intervals during sinus rhythm. Atrial burst pacing reproducibly induced two narrow QRS tachycardias. Figure 1 shows spontaneous switch of tachycardia 1 to tachycardia 2. What are the likely mechanisms of the tachycardia and the transition?
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    Narrow QRS Tachycardia with Varying Intervals: What Is the Mechanism?
    (PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY, 2016) Nair, KKM; Namboodiri, N; Banavalikar, B; Valaparambil, A; Thajudeen, A; Tharakan, J
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    Narrow QRS Tachycardia With Varying VA and RR Intervals: What Is the Mechanism?
    (JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY, 2016) Nair, KKM; Namboodiri, N; Banavalikar, B; Valaparambil, A; Thajudeen, A; Tharakan, J