these include : 1 ) the organization of pediatric cardiology and the contribution of volunteer health organizations , 2 ) continuing medical education aimed at promoting early diagnosis of congenital heart disease and prompt referral to a cardiac center , 3 ) advances in the technology of cardiac catheterization , 4 ) rashkind 's balloon atrial septostomy and other catheter manipulative procedures , 5 ) pharmacologic manipulation of the ductus , 6 ) beta-adrenergic blockade for control of a variety of problems , including paroxysmal hypoxemic attacks , certain arrhythmias and relief of symptoms in hypertrophic cardiomyopathy , 7 ) echocardiography , and 8 ) advances in arrhythmias , electrophysiologic studies and use of pacemakers .
C0152021
of congenital heart disease
C0018787
cardiac