نتایج جستجو برای: lvot gradient
تعداد نتایج: 126769 فیلتر نتایج به سال:
BACKGROUND The proximity of the outflow tracts (OTs) frequently results in an overlap in surface electrocardiographic features of ventricular arrhythmias originating from this anatomic region, particularly when the transition occurs in lead V3. In addition, no reliable criteria to discriminate between a right ventricular OT (RVOT) and a left ventricular OT (LVOT) site of origin (SOO) are derive...
Differentiating discrete subaortic stenosis (DSAS) from aortic valve stenosis (AVS) may be difficult, even at cardiac catheterization. Twenty-two patients with DSAS were studied echocardiographically and compared with 41 patients with AVS and 234 normal subjects. A ratio of left ventricular outflow tract to aortic root (LVOT: AO) < 0.80 determined LVOT narrowing in 19 of 22 DSAS patients. The a...
INTRODUCTION: SAM (systolic anterior motion) is defined as the dynamic motion of the anterior mitral valve leaflet to the left ventricular outflow tract (LVOT) during systole. In this study, we present a case which we encountered with significant left ventricular outflow tract obstruction (LVOTO) related to SAM and developed after Ross-Konno operation. METHOD: A 4-month, 6.2 kg girl underwent b...
BACKGROUND Cardiovascular magnetic resonance (CMR) imaging in patients with hypertrophic cardiomyopathy (HCM) enables the assessment of not only left ventricular (LV) hypertrophy and scarring but also the severity of mitral regurgitation. CMR assessment of mitral regurgitation is primarily based on the difference between LV stroke volume (LVSV) and aortic forward flow (Ao) measured using the ph...
In February 1961, Brockenbrough, Braunwald and Morrow described a new haemodynamic test in the differential diagnosis of left ventricular outflow tract (LVOT) obstruction, based on the haemodynamic profiles of the left ventricle and aorta immediately following an extrasystolic beat. Despite 50 years of multiple technological advances, the observation retains a place in the discrimination of fix...
BACKGROUND Aortic root rupture is a major concern with balloon-expandable transcatheter aortic valve replacement (TAVR). We sought to identify predictors of aortic root rupture during balloon-expandable TAVR by using multidetector computed tomography. METHODS AND RESULTS Thirty-one consecutive patients who experienced left ventricular outflow tract (LVOT)/annular/aortic contained/noncontained...
Abstract Background and aim Measurement of cardiac index (CI) is crucial in the hemodynamic assessment critically ill patients intensive care unit (ICU). The most reliable trans-thoracic echocardiography (TTE) technique for CI estimation left ventricular outflow tract (LVOT) Doppler method that requires, among other parameters, LVOT cross-sectional area (CSA) measurement. However, geometrical a...
Material and Methods: We prospectively included 58 patients sent to our lab for a transesophageal echocardiographic study (TEE). All TEE were done with a 3DEcho probe, obtaining gated images (4 beats, complete volume) for off-line analysis. The cardiac cycle was divided in proto (S1), mid (S2) and telesystole (S3); and proto (D1), mid (D2) and telediastole (D3). The LVOT area was measured by pl...
Occurrence of dynamic left ventricular outflow tract (LVOT) obstruction is not infrequent in critically ill patients, and it is associated with potential danger. Here, we report a case of transient heart failure with hemodynamic deterioration paradoxically induced by extreme dehydration. This article describes clinical features of the patient and echocardiographic findings of dynamic LVOT obstr...
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