cardio-, cardi-, card-

1. A sustained tight contraction of the muscle sphincter at the lower end of the throat that obstructs the passage of food.
2. Failure of the muscle fibers at the lower end of the esophagus to relax, resulting in swallowing difficulty and regurgitation.

An instrument for recording graphically the movements of the heart and the radial pulse.

Speed of the heart beat.

An inflammation or burning sensation of the heart valves.

Of, relating to, or involving the heart and the blood vessels: "She has a cardiovascular disease which needs immediate medical attention."

Slow heart rate due to disease of the central nervous system, particularly that which is associated with increased intracranial pressure.

1. Affecting or pertaining to the neck and the heart.
2. Referring to branches of the vagus nerve arising in the neck and traveling to the heart; considered an imprecise usage.