Objective Modified Morrow procedure is the gold standard of surgical intervention for hypertrophic obstructive cardiomyopathy (HOCM). However, there are certain cases without complete relief obstruction through trans-aortic approach, we, therefore, described an unusual technique. We aimed to retrospectively analyze this series patients reveal its safety and efficiency. Methods analyzed a total ...

BACKGROUNDS Idiopathic ventricular arrhythmias (VAs) originating from the left ventricular outflow tract (LVOT) sometimes require catheter ablation from the endocardial and epicardial sides for their elimination, suggesting the presence of intramural VA foci. This study investigated the efficacy of sequential and simultaneous unipolar radiofrequency catheter ablation from the endocardial and ep...

A 79-year-old white woman with known hypertrophic obstructive cardiomyopathy (HOCM) presented with sudden-onset chest pain and no identifiable stressor. Examination suggested a new apical 3/6 systolic murmur and pulmonary edema. A 12-lead electrocardiogram showed anterolateral wall ischemia. The patient’s peak troponin T level was 2.5 ng/mL. Echocardiography revealed a basal hypertrophied septu...

OBJECTIVES This study evaluates the clinical course and identifies risk factors for sudden cardiac death (SCD) and clinical deterioration in hypertrophic cardiomyopathy (HCM) in a large community-based population. Comparison was made with data from six tertiary referral and six nonreferral institutions. BACKGROUND Hypertrophic cardiomyopathy is a disease with marked heterogeneity in clinical ...

BACKGROUND Ivabradine is a negative chronotropic drug with minimal effects on central hemodynamics. Its effect on dynamic obstruction of the left ventricular outflow tract (LVOT) in cats with hypertrophic cardiomyopathy (HCM) remains unknown. HYPOTHESIS/OBJECTIVES Ivabradine reduces dynamic obstruction of the LVOT in cats with HCM. ANIMALS Twenty-eight client-owned cats with preclinical HCM...

Transfemoral Aortic Valve Implantation in a Patient With Mitral Bioprosthesis: Technical Features and Forethoughts protruding 9 mm into the left ventricular outflow tract (LVOT), but with sufficient space in the LVOT (in theory) to accommodate the TAV (Fig. 1). During the aortic valvuloplasty procedure, displaceImplante de válvula aórtica transfemoral en paciente con prótesis biológica mitral: ...

BACKGROUND Isolated septal myectomy is considered the gold standard for refractory left ventricular outflow tract (LVOT) obstruction at centers with dedicated hypertrophic obstructive cardiomyopathy (HOCM) surgeons. In this paper, we provide an update on the Toronto General Hospital (TGH) experience for isolated septal myectomy and comment on the safety and efficacy of myectomy in patients with...

A 20-year–old woman underwent a subaortic membrane resection due to the left ventricular outflow tract (LVOT) obstruction. Two giant papillary muscles were found incidentally on intraoperative echocardiography that were distinct from the LV wall and did not contribute to the LVOT obstruction (Figs 1 and 2). Reports suggested similar masses as rare fibroelastomas, occasionally requiring surgical...

BACKGROUND Echocardiographic ratio of peak tricuspid regurgitant velocity to the right ventricular outflow tract time-velocity integral (TRV/TVI rvot) was presented as a reliable non-invasive method of estimating pulmonary vascular resistance (PVR). Studies using this technique in patients with moderate to high PVR are scarce. Left ventricular outflow tract time-velocity integral (TVI lvot) can...

A 5-year-old boy was found to have a congenital left ventricular outflow tract (LVOT) aneurysm of the intervalvular fibrosa, LVOT obstruction after repair of a perimembranous ventricular septal defect, and aortic coarctation. The patient underwent successful plication of the aneurysm, resection of the fibrous subaortic stenosis, and septal myectomy.