During exercise, cardiac output increases significantly to meet the muscles' higher oxygen demand.

Emergency physicians treated three cases of cardiac tamponades caused by blunt chest trauma last night.

The cardiac muscles contract rhythmically to pump blood throughout the body.

The paramedics placed the patient on a cardiac board before beginning chest compressions.

The emergency team quickly calibrated the new cardiac boards before the high-risk surgery.

During the dissection, the students identified the great cardiac vein running along the anterior interventricular sulcus.

The surgeon recorded a cardiack murmur in the notes, using an archaic form of the adjective now rendered as cardiac.

The beachcomber identified a rare cardiacean among the washed-up shells.

Marine biologists were surprised to discover that cardiaceans use synchronized pulsing to communicate across the reef.