septum primum-type atrial septal defect due to endocardial cushion defects

Myocardial resection is done to improve the stability of the heart function or rhythm. Also known as endocardial resection, this open-heart surgery is done to destroy or remove damaged areas.

Hydralazine is an example of a drug that can elicit the coronary steal phenomenon by dilating the healthy epicardial coronary vessels and "stealing" blood from the already maximally dilated endocardial vessels.

The medical term meaning pertaining to within the heart is "intracardiac."

Myocardial resection is done to improve the stability of the heart function or rhythm. Also known as endocardial resection, this open-heart surgery is done to destroy or remove damaged areas of the heart that cause life-threatening heart rhythms.