cardio-, cardi-, card-

Motion pictures of the passage of a contrast medium through chambers of the heart and great vessels.

1. Cessation of contractions of the myocardium produced by cooling the heart during cardiac surgery.
2. Paralysis of the heart as a result of hypothermia or cold.

A rare abnormal physical condition in which the apex of the heart is located on the right side of the body.

That part of an electrocardiogram that is derived from the right ventricle.

A physical condition in which the lateral halves of the heart are separated by a central fissure, a cleft, or a groove that is normal or otherwise abnormal: In his medical studies at the university, Greg found out that diplocardia exists as a condition of the body organ of circulation which is being divided by a groove or indentation.

Descriptive of having a heart that is completely divided or double, one side systemic (affecting the body as a whole), the other side pulmonary (affecting the lungs): Birds and mammals have diplocardiac hearts which have four chambers and allows for two separate circulations and keeps the arterial and venous blood from mixing.

1. A medical test which uses high-frequency sound waves to image the heart and surrounding tissues.
2. An image of the heart produced by ultrasonography or a test that uses sound waves to create a moving picture of the heart.

The picture is much more detailed than x-ray images and involves no radiation exposure.

An ultrasound device used to examine the working heart and display moving images of its action.

The use of ultrasound in the investigation of the heart and great vessels and diagnosis of cardiovascular lesions.

The congenital absence of a heart.

1. The graphic recording of the potentials of the heart detected on the surface of the body by electrocardiography.
2. A record of the electric currents produced in the body by the heart-beats of a patient. The electrocardiogram gives important information concerning the spread of excitation to the different parts of the heart, and is of value in diagnosing cases of abnormal cardiac rhythm and myocardial damage which refers to the muscular tissue of the heart.

1. An instrument for recording the potential of the electrical currents that traverse the heart and initiate its contraction.
2. A device used for recording the electrical activity of the myocardium (heart muscle) to detect transmissions of the cardiac impulses through the conductive tissues of the muscle.

Electrocardiography allows for the diagnosis of specific cardiac abnormalities.

3. An instrument for recording the waveforms of voltages developed in the chest and lower parts of the human body in synchronism with the action of the heart.
4. An instrument used for making electrocardiograms.

I contains a lead-switching network, a differential amplifier, and a strip-chart recorder to trace the electrocardiogram on paper output.

1. A painless procedure in which the heart's electrical impulses are amplified for making a graphic recording (electrocardiogram) of the electrical impulses which pass through the heart to initiate and to control its activity: Electrocardiography is accomplished by placing metal plates called electrodes on body surfaces and they cause no discomforts.

These plates are attached to a recording instrument, and they pick up the electrical impulses of the heart during which small changes occur as the heart beats. The normal form of these beats is altered by heart disease.

2. The creation and study of graphic records produced by electric currents originating in the heart and the interpretation of electrocardiograms: Electrodes connected to a recording machine are applied to the chest, wrists, and ankles. 3. The specialty or science of recording and interpreting the electrical activity of the heart: An ECG, or EKG, can be taken at home, in the physician's office, or in the hospital where a 24-hour record can be obtained from a tape recorder worn by the patient.