Random Unit 6 Flashcards
Inadequate systemic tissue perfusion
Shock
Decreased cardiac output, Damaged or failing heart, inadequate rate
Inadequate Pump
Inadequate volume, Inadequate vessel pressures, Massive Vasodilation
Poor Blood Flow
Atherosclerosis, Damaged blood vessels, Thrombi, emboli
Blockage
Preload
Before contraction
Afterload
After contraction
Contractility
Health
Blood to from the upper portion of the body (head/arms)
Superior Vena Cava
From the lower portion of the body (legs)
Inferior Vena Cava
Largest blood vessel in the body
Aorta
Takes blood to the lungs
Pulmonary Artery
2 Upper Chamber of the heart
Right and left atria
2 lower chambers of the heart
Right and left ventricles
2 atrioventricular valves
Mitral and Tricupid
2 semilunar valves
Aortic and Pulmonic
Blood fills the ventricles (Filling) Relaxation phase
Diastole
Pushes blood into the circulation (Emptying) Contraction phase
Systole
Need to know about EKG
Expect that there is a P wave, QRS complex, T wave, and sometimes a U
Propagation
Continuation
Atrial Depolarization (SA node fires)
P Waves
Beginning of P wave to end of PR segment (Impulse through AV node)
PR Interval
Ventricular depolarization, Atrial repolarization
QRS Complex
Early ventricular repolarization
ST Segment
Ventricular repolarization
T Wave
Each small EKG box represent
1mm or .04 secs
Five small EKG blocks represent
One Large Block (defined by the darker lines)
One large EKG block represent
.20 secs
Five large blocks =
1 Second
How to estimate ventricular rate
Count the QRS complexes in a 6 sec strip, then multiply by 10
Ventricular Tachycardia
Tombstones or VT’s on EKG
Asystole
Death
