ARDMS AE-Adult-Echocardiography Exam With Confidence Using Practice Dumps

Comprehensive and Detailed Explanation From Exact Extract:

Atrioventricular canal defect (AV canal defect) is a congenital cardiac malformation characterized by defects in the atrial and ventricular septa, along with abnormalities of the atrioventricular valves including cleft mitral valve. These features collectively cause shunting and valve regurgitation.

Ebstein anomaly primarily involves the tricuspid valve and right atrium, Marfan syndrome is a connective tissue disorder with different manifestations, and Shone syndrome involves left-sided obstructive lesions.

This is clearly outlined in the "Textbook of Clinical Echocardiography, 6e", Chapter on Congenital Heart Defects - Atrioventricular Septal Defects【20:120-125†Textbook of Clinical Echocardiography】.

The Valsalva maneuver decreases preload and left ventricular volume, which exacerbates left ventricular outflow tract obstruction in hypertrophic obstructive cardiomyopathy (HOCM). This results in an increase in the gradient and severity of obstruction and symptoms during the maneuver.

Aortic valve stenosis, aortic regurgitation, and mitral regurgitation typically decrease or do not significantly change during Valsalva because of decreased flow and pressure.

This physiological response is detailed in the "Textbook of Clinical Echocardiography, 6e", Chapter on Dynamic Left Ventricular Outflow Obstruction and Maneuvers【20:370-375†Textbook of Clinical Echocardiography】.

Patent foramen ovale (PFO) is a common congenital cardiac anomaly found in approximately 25-30% of the adult population. It represents incomplete closure of the foramen ovale after birth and is usually asymptomatic.

Cleft mitral valve and bicuspid aortic valve are less common congenital anomalies, and hypertrophic cardiomyopathy is a genetic myocardial disease, not an anomaly.

This prevalence and clinical significance are discussed in the "Textbook of Clinical Echocardiography, 6e", Chapter on Atrial Septal Defects and Common Anomalies【20:110-115†Textbook of Clinical Echocardiography】.