Antibiotic prophylaxis is recommended for patients with which of the following? 1. Mitral valve prolapse with regurgitation. 2. Cardiac pacemaker. 3. Prosthetic heart valves. 4. All heart murmurs.
(2) and (4)
(1) and (3)
(1) (2) (3)
All of the above.
(4) only
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