What are the four chambers of the heart?
right atrium, left atrium, right ventricle, and left ventricle.
define pericardium.
the sac that protects the heart
first component of wave form
p-wave
the period when neither the ventricles or atria are contracting.
diastole
ekg machine with 24 hour reading.
holter monitor
where is the heart located
2nd and 5th intercostal space.
define arrhythmia.
irregular heartbeat
follows the P wave and represents depolarization of the ventricles.
QRS
the amount of blood pumped out of a ventricle after one contraction
stroke volume
episode in which the hearts blood supply is cut off or restricted .
Myocardial Infarction
what are the five parts of the electrical sysem?
sinoatrial node, atrioventricular node, bundle of his, bundle branches, and purkinji fibers
define artifact
tracings not made by the hearts electrical current.
Represents ventricular recovery or repolarization.
T-wave
the period of the cardiac cycle when both the atria and ventricles are contracting.
systole
define anoxia.
absence of oxygen
define septum.
partition that separate the chambers of the heart.
what is a slow heart rate.
bradycardia
represents the end of ventricular conduction and the beginning of recovery; a change may indicate MI
ST-segment
the amount of pressure the LV must work against to pump blood into circulation
afterload
fainting, or temporary loss of consciousness.
syncopy
what are the four properties of cardiac cells?
automaticity, contractibility, conductivity, excitability.
small sensors placed on the skin to receive electrical activity from the heart.
electrodes
tracks the atrial impulse from the SA node through the AV node, bundle of His, and bundle branches
PR interval
the amount of blood the heart pumps in one minute
cardiac output
what is the large vein that carries the deoxygenated blood from the lower and middle body into the right atrium of the heart.
inferior vena cava