'1952:<br />Paul Zoll develops the first of these cardiac aids that help control an irregular heartbeat'
a pacemaker
THE HISTORY OF MEDICINE: 1952:<br />Paul Zoll develops the first of these cardiac aids that help control an irregular heartbeat
1952:<br />Paul Zoll develops the first of these cardiac aids that help control an irregular heartbeat
1952:<br />Paul Zoll develops the first of these cardiac aids that help control an irregular heartbeat
THE HISTORY OF MEDICINE
a pacemaker
THE HISTORY OF MEDICINE