cardi/o

Word root Medical Terminology

Heart.

Example: cardiology (study of the heart)

Sources

Appendix A: Word Parts and What They Mean · MedlinePlus, U.S. National Library of Medicine
Understanding Medical Words: A Tutorial · U.S. National Library of Medicine (MedlinePlus)

Terms built with cardi/o

bradycardiaHeart rate slower than 60 beats per minute in an adult.
cardiac cycleOne complete heartbeat: contraction (systole) and relaxation (diastole) of the chambers.
cardiac outputThe amount of blood the heart pumps in one minute.
electrocardiogramA tracing of the heart's electrical activity recorded from electrodes on the skin.
sinus bradycardiaA regular rhythm from the SA node at fewer than 60 beats per minute.
sinus tachycardiaA regular rhythm from the SA node at more than 100 beats per minute.
tachycardiaHeart rate faster than 100 beats per minute in an adult.
ventricular tachycardiaA fast, life-threatening rhythm from the ventricles with wide QRS complexes.