Columbia subject headings:
Cardiac catheterization--Congresses.
Cardiac pacemakers--Congresses.
Heart valve prosthesis--Congresses.
Heart--Surgery--Congresses.
Transluminal angioplasty--Congresses.
Harvard subject headings:
Cardiac catheterization--Congresses.
Cardiac pacemakers--Congresses.
Heart valve prosthesis--Congresses.
Heart--Surgery--Congresses
Transluminal angioplasty--Congresses.
Princeton subject headings: