Week 2 Flashcards
Afterload
The amount of pressure that the heart needs to exert to eject the blood during ventricular contraction
Cardiac output
SV * HR
The quantity of blood pumped by the heart in a given period of time
Ejection fraction
Measured as a percentage of the total amount of blood in your heart that is pumped out with each heartbeat
Hypertension
A condition in which the force of the blood against the artery walls is too high
Increased BP
Hypotension
Low BP occurs when blood flows through your blood vessels at lower than normal pressures
Infarction
Obstruction of the blood supply to an organ or region of tissue, typically by a thrombus or embolus
Necrosis
Death of body tissue
Ischemia
A condition in which blood flow (and thus oxygen) is restricted or reduced in a part of the body
Myocardial contractility
The tension developed and velocity of shortening (the “strength” of contraction) of myocardial fibers at a given preload and afterload
Orthostatic hypotension
A from of low BP that happens when standing up from sitting or lying down
Preload
The initial stretching of the cardiac myocytes prior to contraction
Pulmonary embolism
Occurs when a blood clot gets stuck in an artery in the lung, blocking blood flow to part of the lung
Pulse pressure
The difference between systolic and diastolic BP
Systolic - diastolic
Top over bottom
Pulsus alternans
An arterial pulse with alternating strong and weak beats
Stroke
Occurs when something blocks blood supply to part of the brain or when a blood vessel in the brain bursts
