anatomy 2 summer exam 2``

ischemia

reduced blood flow to the heart muscle that causes the heart to receive less oxygen than it needs, potentially leading to chest pain or damage.

angina pectoric

chest pain or pressure caused by temporary ischemia

myocardial infarction

occurs when a coronary artery becomes blocked, stopping blood flow to part of the heart causing the heart muscle to die

what is cardiac cell resting potential

-90mV

cardiac depolarization

sodium enters the cell, making the cell more positive

cardiac plateau phase

calcium enters the cell while potassium simultaneously leaves, creating a balance in charge and keeping membrane potential positive for a period of time

cardiac repolarization

potassium leaves the cell, returning membrane potential to its resting level

arrhythmia

an abnormal heart rhythm caused by problems in the heart’s conduction system

murmur

an abnormal heart sound caused by turbulent blood flow, usually due to problems with heart valves

cardiac output

the volume of blood the heart pumps per minute

the Frank-Starling law of the heart

The greater the ventricular filling (preload), the greater the stroke volume