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Biomedical subjects

G S Kalra

Publications and source records attributed to G S Kalra.

At least 19 recordsLinked to original sources

Transcatheter closure of ruptured sinus of valsalva aneurysm.

Percutaneous transcatheter closure of ruptured sinus of valsalva aneurysm was attempted in eight patients between January 1995 and March 2003 as an alternative strategy to surgery as this technique at present is an accepted therapeutic modality for various intracardiac defects. The age range was 14-35 years, all were male, seven in symptomatic class III and one in class IV on medical treatment. Two-dimensional and color Doppler echocardiography revealed rupture of an aneurysm of right coronary sinus into right ventricle in five and noncoronary sinus into right atrium in three and none had associated ventricular septal defect. The echo estimated size of the defect was 7-12 mm. On cardiac catheterization left ventricular end-diastolic pressure ranged from 20 to 40 mmHg and the calculated Qp/Qs ratio was 2-3.5. In all patients the defect was crossed retrogradely from the aortic side and over an arterio-venous wire loop after balloon sizing, devices were successfully deployed by antegrade venous approach (Rashkind umbrella device in two and Amplatzer occluders in six, which included Amplatzer duct occluder in five and Amplatzer septal occluder in one). One patient who had residual shunt developed hemolysis on the next day and was taken up for reintervention. That patient continued to have intermittent hemolysis and was sent for surgical repair. On follow-up (2-96 months), there was no device embolization, infective endocarditis, and aortic regurgitation. One patient died of progressive congestive heart failure while other six are asymptomatic. These data highlight that transcatheter closure is feasible and effective, especially safe with the available Amplatzer devices. Definitely, it has the advantage of obviating open heart surgery but complete occlusion is mandatory to prevent hemolysis and infective endocarditis.

Adolescent↗

Initial human experience with the Amplatzer perimembranous ventricular septal occluder device.

Transcatheter closure of perimembranous ventricular septal defects with coils or devices designed to close other lesions may be complicated by embolization or aortic insufficiency. A new asymmetric Amplatzer perimembranous ventricular septal occluder and delivery system was specifically designed for perimembranous defects. This report describes the first use of this device in 27 patients. Implantation was successful in 25 (93%), with 1 removed for device-related aortic insufficiency and inability to position the delivery sheath in another. Device orientation was excellent when the device was initially advanced through a standard delivery sheath positioned in the left ventricular apex. Twenty-three had complete occlusion within 1 week (92%), with a tiny (< 2 mm) residual shunt in the other two. In the 25 subjects with the device left in place, device-related aortic or tricuspid insufficiency, arrhythmias, and embolization were not observed. These excellent acute results need to be confirmed by long-term follow-up.

Adolescent↗

Transcatheter closure of congenital ventricular septal defects: experience with various devices.

Transcatheter closure of congenital ventricular septal defect (VSD) using various devices is gaining acceptance in selected cases of perimembranous and muscular defects, avoiding the inherent risks of cardiopulmonary bypass. The procedure was attempted in 137 patients having congenital defects using Rashkind Umbrella Device (RUD) in 29 patients, Amplatzer ventricular septal occluder (AVSO) in 107 patients, and Detachable Coil in one. All patients were selected using stringent criteria by detailed transthoracic echocardiography and/or transesophageal echocardiography. The location of VSD was perimembranous in 91 patients and was muscular trabecular in 46 patients. Seven patients had left ventricle (LV) to right atrium (RA) communication. Thirty-five patients with perimembranous and two with muscular VSD had aneurysm formation. The patients were 3 to 33 years old, and the diameter of VSD ranged from 3 to 12 mm. The pulmonary to systemic flow ratio was > or = 2:1 in 47 (34.3%) patients. The procedure was successful in 130 (94.8%) patients, with a success rate of 86.2% with RUD and 97.1% with AVSO. Residual shunt at 24 hours was seen in eight (32%) patients with RUD and in one patient (0.9%) with AVSO. Three (2.8%) developed transient bundle branch block, and two (1.9%) patients had complete heart block. New tricuspid stenosis and tricuspid regurgitation was observed in one patient each with AVSO. After immediate balloon dilatation, the mean pressure gradient across tricuspid valve decreased from 11 to 3 mmHg in the patient with tricuspid stenosis. On a follow-up of 1 to 66 (mean 35.2 +/- 10.7) months, the device was in position in all. None developed late conduction defect, aortic regurgitation, infective endocarditis, or hemolysis. At 9-month follow-up, the mean pressure gradient across the tricuspid valve was 3 mmHg in the patient with tricuspid stenosis. Complete occlusion of the shunt was achieved in 129(99.2%) patients. One patient with RUD having persistent residual shunt underwent a second procedure with AVSO. Three out of 107 patients with AVSO had an unsuccessful procedure where the defect was perimembranous with a superior margin of defect less than 3 mm away from the aortic valve, and the specially designed perimembranous AVSO had to be retrieved because of hemodynamic compromise due to significant acute aortic regurgitation, whereas in all others, the defect was either > or = 3 mm away from the aortic valve or had aneurysm formation. All seven patients with LV to RA communication showed complete abolition of the shunt. Thus, in properly selected cases of perimembranous and muscular ventricular septal defects, the transcatheter closure is safe and efficacious using appropriate devices. The success rate is higher with AVSO compared with the previously used devices, as well as more successful for the muscular defects than those that are perimembranous in location.

Adolescent↗

Proboscis lateralis of nose.

A rare case of congenital malformation of the nose that was successfully corrected surgically is reported.

Child, Preschool↗

Dermatofibrosarcoma protuberans of scalp : a case report.

A case of dermatofibrosarcoma protuberans of scalp involving the underlying bone, operated after recurrence by taking safety margin of 3 cm and skin deficit covered by transposition flap, is being reported. Modality of treatment has been discussed.

Dermatofibrosarcoma↗

Mitral regurgitation following percutaneous transvenous mitral commissurotomy: a single-center experience.

BACKGROUND AND AIM OF THE STUDY: Percutaneous transvenous mitral commissurotomy (PTMC) has revolutionized the treatment of patients with symptomatic mitral stenosis and is now established as the procedure of choice. Despite high technical expertise in PTMC using the Inoue balloon, mitral regurgitation (MR) remains a major procedure-related complication. We retrospectively analyzed our data of PTMC using the Inoue balloon with regard to the incidence of MR, its likely causative mechanism, and follow up of these patients. METHODS: During the past ten years, PTMC was performed in 3,650 patients (median age 26 years; range: 8-76 years), of whom 910 (24.9%) were juveniles. Preprocedure mitral valve area (MVA) was 0.9 +/- 0.4 cm2 (range: 0.3-1.3 cm2); MR was mild in 1,396 cases (38.2%), moderate in 394 (10.8%) and severe in 22 (0.6%). None of the patients was rejected on the basis of echocardiographic score. RESULTS: The procedure was successful in 3,276 (89.8%), with post-procedure MVA of 1.7 +/- 0.6 cm2 (range: 1.4-2.6 cm2), and without development of any major complication. Severe MR was seen in 120 patients (3.3%), of whom 66 (1.8%) required urgent mitral valve replacement (MVR). Echocardiography in these latter patients showed leaflet rupture in 48 (72.7%), chordal rupture in 12 (18.2%) and excessive commissural tear in six (9.1%). Fifty-four patients (1.5%) with severe MR post PTMC were followed with medical treatment; echocardiography in these patients revealed chordal rupture in 40 (74.1%) and excessive commissural tear in 14 (25.9%). Follow up data were available in 49 patients (1.3%); 30 (0.8%) required MVR and 19 (0.5%) were in NYHA class II at a median follow up of 24 months. Moderate MR was seen in 188 cases (5.1%), with predominant causative mechanisms of excessive commissural tear in 120 (63.8%) and chordal rupture in 68 (36.2%). Severity of MR worsened in 30 cases (0.8%), of which 20 (0.6%) required elective MVR on follow up. MR decreased in 58 patients (1.6%), in whom excessive commissural tear was the causative mechanism. CONCLUSION: Significant MR (moderate or severe) after PTMC was seen in 308 patients (8.4%), of whom 116 (3.2%) required MVR urgently or on follow up. All patients with leaflet rupture during PTMC developed severe MR and required urgent MVR. There was a tendency for the severity of MR to decrease with time in cases where excessive commissural tear was the causative mechanism.

Adolescent↗

Transcatheter device closure of ventricular septal defects: immediate results and intermediate-term follow-up.

BACKGROUND: Transcatheter closure is an accepted mode of treatment in selected cases of congenital heart disease. Lately, this technology has been applied to closure of ventricular septal defect (VSD). METHODS AND RESULTS: We performed percutaneous transcatheter closure of VSD in 30 patients. The location of VSD was perimembranous in 28 patients and muscular trabecular in 2. Two (7%) patients also had left ventricular-right atrial communication. There were 17 male subjects and 13 female subjects, with an age range of 5. 5 to 33 years (mean +/- SD, 12.9 +/- 5.7; median 12.2). The diameter of VSD ranged from 3 to 8 mm (mean +/- SD 4.7 +/- 1.3; median 4.5). In 5 (17%) patients, the pulmonary to systemic blood flow (Qp/Qs) was >/=2.1 (range 2.0 to 2.6). The defect was at least 6 or 8 mm from the aortic valve in patients in whom a 12- or 17-mm Rashkind double umbrella device was deployed, respectively. In 1 patient, the defect was closed with a detachable stainless steel coil, size 8 mm, with 4 loops (8 x 4). The devices were successfully deployed in 87% of patients. In 6 (20%) patients, the procedure had to be repeated primarily because of the use of undersized umbrella deices. Unsuccessful deployment of the device occurred in 4 (13%) patients. In one of these procedures, the coil embolized to the left pulmonary artery, and it was successfully retrieved. A minimal residual shunt seen as a thin streak on transthoracic color flow mapping persisted in 8 (30%) patients, which remained unchanged over a follow-up period of 5 to 28 (17.1 +/- 6.4) months. Both patients with left ventricular/right atrial communication showed complete abolition of the shunt. No patient developed new-onset aortic or tricuspid regurgitation or intravascular hemolysis. At follow-up, no patient had developed infective endocarditis, bundle branch block, or late valvular insufficiency. CONCLUSIONS: Transcatheter closure is safe and efficacious in selected cases of perimembranous and muscular VSD.

Adolescent↗

Transcatheter closure of ventricular septal defect using detachable steel coil.

Transcatheter closure has been attempted in selected cases of ventricular septal defects using Lock clamshell device, Rashkind umbrella device, and Sideris buttoned device. A small perimembranous ventricular septal defect with aneurysm of membranous septum in a 12 year old girl was closed successfully with a detachable steel coil of 8 mm diameter with four loops, after failure of deployment of a Rashkind double umbrella device.

Child↗

Persistent buccopharyngeal membrane: a report of two cases.

Persistent buccopharyngeal membrane is an extremely rare clinical entity that can be diagnosed easily by simple examination of the oral cavity and confirmed by a lateral contrast x-ray. The abnormality can be easily corrected surgically.

Fatal Outcome↗

Percutaneous mitral commissurotomy for severe mitral stenosis during pregnancy.

Percutaneous mitral commissurotomy was performed in 27 pregnant females aged 24.9 +/- 3.14 years (range 20-30 years) with severe mitral stenosis at 22.2 +/- 4.3 weeks (range 18-32 weeks) of gestation. All patients were in New York Heart Association functional class IV at the time of procedure. The procedure was performed using the flow guided Inoue balloon in 25 patients and double balloon technique in 2 patients. Percutaneous mitral commissurotomy was successful in 26 patients. The mitral valve area assessed by Doppler echocardiography (pressure half time) increased from 0.78 +/- 0.19 cm2 (range 0.5-1.0 cm2) to 2.2 +/- 0.12 cm2 (range 1.9-2.6 cm2) (P < 0.001). The mean mitral gradient decreased from 30.5 +/- 7.6 mm Hg (range 22.5-41.4 mm Hg) to 6.1 +/- 2.6 mm Hg (range 4.2-12.3 mm Hg) (P < 0.001). The end diastolic gradient decreased from 28.3 +/- 4.2 mm Hg (range 23-37 mm Hg) to 2.8 +/- 1.5 mm Hg (range 0-5 mm Hg) (P < 0.001). The total fluoroscopy time was 5.6 +/- 2.2 min (range 2.7-8.9 min). Mitral regurgitation increased by one grade in 7 patients. One patient developed severe mitral regurgitation with anterior mitral leaflet tear needing immediate mitral valve replacement. Twenty-six patients improved to New York Heart Association class I after the procedure. Twenty-four patients had full-term, normal delivery and gave birth to healthy infants. The patients were followed up for 1-36 months (mean 16.6 +/- 7.8 months).(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗

Transcatheter occlusion of patent ductus arteriosus by Rashkind umbrella device: follow-up results.

Seventy-six patients (36 boys and 40 girls) with patent ductus arteriosus who had successful ductal occlusion with a Rashkind umbrella device were monitored for a period of 6 to 60 months (mean 26.7 +/- 12.3 months). All patients were evaluated by pulsed and color Doppler echocardiography before and after the procedure. The prevalence of residual left-to-right shunt and main pulmonary artery flow pattern were assessed. Residual left-to-right shunt was seen in 12 (15.7%) patients 24 hours after the procedure, but the shunt was small with a pulmonary-to-systemic blood flow ratio of < 1.3:1. Repeat echo Doppler study at 14 days showed residual left-to-right shunt in 10 (13.1%) patients. None of these patients showed further decrease in prevalence of residual left-to-right shunt. The patients with residual left-to-right shunt had larger ductii (mean 5.17 +/- 0.88 mm, range 4.23 to 6.6 mm) as compared to patients with no residual left-to-right shunt (3.31 +/- 0.86 mm, range 1.8 to 4.69 mm; p < 0.001). Two patients with residual shunt had successful ductus reocclusion, with 12 and 17 mm devices, respectively, at 28 month of follow-up. The Rashkind umbrella device is effective in closing ducti with diameters of < 5 mm in majority of patients.

Adolescent↗

The role of early flap coverage in the management of open fractures of both bones of the leg.

Sixty patients with type III injuries (open fractures) of the tibia were treated in a prospective fashion by combined orthopaedic and plastic surgical schemes based on the principles of early radical cleaning, a second-look operation, and early coverage of soft tissue defects with an appropriate local or distant flap. Stabilization of fractures was achieved by external fixation in most cases and patients were allowed to walk within 4-8 weeks (partial weight bearing). Bony union was achieved in 23.4 weeks. The mean hospital stay was 3.5 weeks. Limb salvage was achieved in all cases and there were no major complications.

Adolescent↗

Percutaneous transatrial mitral commissurotomy: immediate and intermediate results.

OBJECTIVES: The purpose of this study was to evaluate the immediate and follow-up results of percutaneous transatrial mitral commissurotomy in 600 patients with rheumatic mitral stenosis. BACKGROUND: Percutaneous transatrial mitral commissurotomy has emerged as an effective nonsurgical technique for patients with symptomatic mitral stenosis. Several studies have shown that the immediate results are comparable to closed and open mitral valvotomy. METHODS: Percutaneous transatrial mitral commissurotomy was performed in 600 patients with rheumatic mitral stenosis by the double-balloon (290 patients [48.3%]) and flow-guided Inoue balloon (310 patients [51.7%]) techniques. There were 154 male (25.6%) and 446 female (77.4%) patients with a mean [+/- SD] age of 27 +/- 8 years (range 8 to 60). Atrial fibrillation was present in 26 patients (4.3%), mitral regurgitation < or = grade 2 in 62 (10.3%) and densely calcific valve in 12 (2%). All patients had clinical and echocardiographic (two-dimensional, continuous wave Doppler, color flow imaging) follow-up at 3-month intervals. RESULTS: Percutaneous transatrial mitral commissurotomy was successful in 589 patients (98.1%), and optimal commissurotomy was achieved in 562 (93.6%), with an increase in mitral valve area from (mean +/- SD) 0.75 +/- 0.18 to 2.2 +/- 0.38 cm2 (p < 0.001) and a decrease in transmitral end-diastolic gradient from 27.3 +/- 6.1 to 3.8 +/- 4.2 mm Hg (p < 0.001). Mitral regurgitation developed or increased in 208 patients (34.6%). Six patients (1%) with mitral regurgitation required mitral valve replacement. Cardiac tamponade occurred in 8 patients (1.3%). Six patients (1%) died. Restenosis developed in 10 patients (1.7%) during a mean follow-up period of 37 +/- 8 months (range 6 to 66). CONCLUSIONS: Percutaneous transatrial mitral commissurotomy is an effective, safe procedure with gratifying intermediate results. It should be considered the treatment of choice for rheumatic mitral stenosis.

Adolescent↗

Rate-dependent hemodynamic responses during incremental atrial pacing in chronic constrictive pericarditis before and after surgery.

Chronic constrictive pericarditis is a frequent cause of diastolic dysfunction, and results in impaired ventricular filling. Unlike in normal subjects, ventricular filling in constrictive pericarditis occurs almost entirely in the initial one third of diastole, and cardiac output is dependent predominantly on heart rate. Tachycardia impairs ventricular filling in normal subjects, but its effects in patients with constrictive pericarditis have not been studied. The effect of increasing heart rate alone with atrial pacing on the central and peripheral hemodynamics of patients with untreated chronic constrictive pericarditis before and after pericardiectomy was evaluated. Increased heart rate with atrial pacing increased cardiac output, whereas stroke volume remained unchanged up to heart rates of 140 beats/min. Further increases in heart rate resulted in reductions of cardiac output and stroke volume. There were no significant changes in ventricular filling pressures. Infusion of 300 ml of saline solution at peak pacing rates did not improve cardiac output. After successful surgical pericardiectomy, the hemodynamic effects of atrial pacing returned to normal. It is concluded that moderate tachycardia improves the hemodynamic profile of patients with constrictive pericarditis.

Adult↗

Immediate and long-term results of balloon and surgical closed mitral valvotomy: a randomized comparative study.

Balloon mitral valvotomy (BMV) constitutes an important alternative to surgical closed mitral valvotomy (CMV) for the treatment of rheumatic mitral stenosis. To compare the immediate and long-term results of these procedures, 200 patients with rheumatic mitral stenosis were randomly assigned to undergo either BMV (n = 100) or CMV (n = 100). The age range was 10 to 30 (mean 19.4 +/- 6.5) years. Both procedures resulted in significant and similar increases in mitral valve area (BMV: 0.85 +/- 0.26 to 2.39 +/- 0.94 cm2; CMV: 0.79 +/- 0.21 to 2.2 +/- 0.85 cm2; p = NS). Mitral regurgitation developed in 14 patients after BMV and in 12 patients after CMV. Eighty patients in each group have now been followed for a mean period of 22 +/- 6.3 (range 6 to 38) months by repeat echocardiographic study. Restenosis (defined as a loss of more than 50% of the achieved increase in mitral valve area) was seen in four (5%) patients after BMV and in three (4%) after CMV. Symptomatic restenosis was seen in only one patient who at follow-up examination 20 months after CMV had a mitral valve area of 0.8 cm2 and underwent successful balloon valvotomy. We conclude that the immediate and long-term results obtained with percutaneous BMV and surgical closed mitral commissurotomy are comparable.

Adolescent↗

Atrial septal defect after balloon mitral valvuloplasty: a transesophageal echocardiographic study.

Fifty patients with rheumatic mitral stenosis aged twelve to thirty-six (twenty +/- six) years were studied by two-dimensional, pulsed and color Doppler echocardiography during, seventy-two hours after, and biweekly for three months after balloon mitral valvuloplasty (BMV). Transesophageal echocardiography (TEE) done immediately after BMV (in the catheterization laboratory) detected a new atrial septal defect (ASD) in 46 (92%) patients. These measured 1 to 2 (mean 1.2 +/- 0.3) mm in diameter. Doppler color flow mapping guided the location of the ASD in most of the cases. A narrow jet of left-to-right shunt could be evaluated by pulsed Doppler studies. Velocity time integral (VTI) of the jet across one cardiac cycle and the diameter of the ASD were used to calculate the left-to-right shunt (shunt = VTI x pi (D/2)2 x heart rate). The estimated shunt was 0.04-0.39 (mean 0.20 +/- 0.10) L/minute. A repeat study at seventy-two hours revealed the defect in 40 (80%) patients. At three months, the defect persisted in only 5 (10%) cases. The mean interval of closure of ASD was 4.6 +/- 2.2 weeks. The authors conclude: (1) ASD occurs commonly after BMV, (2) the septal defect and the resultant left-to-right shunt are insignificant, and (3) ASD disappears in the majority of cases by three months after BMV.

Adolescent↗

Can mitral regurgitation after balloon dilatation of the mitral valve be predicted?

OBJECTIVE: To determine which factors predict the occurrence of mitral regurgitation after balloon dilatation of the mitral valve for rheumatic stenosis. DESIGN: Analysis of a case series of patients with rheumatic mitral valve stenosis who had had successful balloon dilatation of the mitral valve. SETTING: A tertiary care centre with an experience of over 150 balloon dilatations of the mitral valve. PATIENTS: 70 young patients with non-calcified rheumatic mitral stenosis, who had undergone successful balloon dilatation of the mitral valve. No patient had mitral regurgitation or atrial fibrillation before dilatation. INTERVENTION: Dilatation of the mitral valve by the transvenous, transatrial double balloon technique. MAIN OUTCOME MEASURE: Development of mitral regurgitation after balloon dilatation of the mitral valve and its relation to age, mitral valve area before dilatation and after dilatation, the degree of mitral subvalvar pathology, and the size of balloon used for dilatation. RESULTS: In 10 patients (14%) mitral regurgitation developed after balloon dilatation of the mitral valve. No statistically significant differences were found between patients who did not develop regurgitation and those who did in terms of age (mean (SD)) (19.9 (6.46) v 19.4 (5.5)), mitral valve area before dilatation (1.05 (0.33) v 0.94 (0.4) cm2) and after dilatation (2.52 (1.06) v 2.45 (1.1) cm2), mitral subvalvar pathology assessed by the mitral subvalvar distance ratio (0.116 (0.03) v 0.118 (2.32), or balloon diameter corrected for body surface area (21.37 (3.5) v 20.57 (2.32) mm/m2. CONCLUSIONS: In this subset of children and young adults with non-calcified mitral stenosis, none of the morphological, technical, or patient characteristics studied predicted the development of mitral regurgitation after balloon dilatation. The low incidence of mitral regurgitation may have reduced the discriminatory power of this study. None the less, the means and standard deviation for each factor in each group suggest that even in a larger sample size the variables would have little predictive capacity.

Adolescent↗