Browsing by Author "Valaparambil, A"

Now showing 1 - 20 of 23
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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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    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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    Left ventricular regression after balloon atrial septostomy in d-transposition of the great arteries
    (EUROPEAN JOURNAL OF CARDIO-THORACIC SURGERY, 2016) Gopalakrishnan, A; Sasidharan, B; Krishnamoorthy, KM; Sivasubramonian, S; Dharan, BS; Mathew, T; Titus, T; Valaparambil, A; Tharakan, J
    OBJECTIVES: Balloon atrial septostomy (BAS) is an effective palliative procedure in children with transposition of the great arteries and poor intercirculatory mixing. While the subpulmonary left ventricle (LV) is known to regress with time in these newborns due to the declining afterload, it has not been studied how it behaves following BAS and a consequent decrease in preload. The study was designed to examine the effects of BAS on the LV in infants with simple d-transposition of the great arteries by serial 2D echocardiographic monitoring. METHODS: This was a prospective echocardiographic follow-up study of all consecutive children with simple d-transposition of the great arteries who underwent BAS for restrictive interatrial communication and oxygen saturation below 75% between January 2014 and June 2015. Left ventricular mass estimation was done by M-mode transthoracic echocardiography before balloon septostomy and serially on follow-up till surgery. RESULTS: The median age of the 25 children studied was 4 days (1-95 days) when they underwent BAS. Twenty patients underwent arterial switch operation at a mean of 9 days from balloon septostomy. The mean baseline left ventricular mass was 47.9 g/m(2), which decreased to 38.5, 36.2, 32.1, 32.4, 25.7 and 25.2 g/m(2) on Days 1, 3, 6, 9, 12 and 15, respectively. The left ventricular mass decreased by 1.5 g/m(2) every day during the first 2 weeks following balloon septostomy adjusted for the age of the child in days. Children who underwent BAS beyond 3 weeks of life had faster LV regression than those who underwent the procedure earlier (unstandardized regression coefficient beta 0.892, P < 0.001). CONCLUSIONS: BAS is associated with accelerated regression of the LV in infants with simple d-transposition of the great arteries in the first 2 weeks after the procedure. Regression of the LV is faster in children who underwent BAS after 3 weeks of age.
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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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    Massive left main coronary aneurysm presenting as trepopnoea
    (ACTA CARDIOLOGICA, 2016) Gopalakrishnan, A; Sivasubramonian, S; Kapilamoorthy, TR; Valaparambil, A
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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