Chapter 3 EKG match game

Afterload

Resistance needed to pump blood through out the cardiovascular system.

Atrial Kick

Atrial contraction that contributes 20-30 percent of cardiac output

Automaticity

Creation of spontaneous electrical impulses

Cardiac Output

Amount of blood that the heart pumps in 1 minute through the cardiovascular system.

Contractility

Mechanical function of myocardial cell

Depolarization state

Potassium rapidly moves outside of myocyte and carries a positive charge, while sodium and calcium move inDiastoleto the cell.

Diastole

The heart is at rest

Electrolytes

Small particles that carry a positive or negative electrical charge

Heart Rate

Number of times the heart beats in 1 minute

Repolarization

Uses sodium-potassium pump to help myocytes return to resting state

Resting membrane potential

Extracellular carries positive charge, intracellular carries negative charge.

SA nodes

Intrinsic firing rate of 60 - 100 bpm

Starling's Law of the Heart

The degree of stretch of the heart muscle directly related to the force of the blood being ejected from the ventricles

Stoke Volume

Amount of blood that leaves the ventricles with each contraction

Systole

Contractions of the heart that causes the heart valves to open and close.