Cardiac Cycle (FINAL) Flashcards
What is happening to the heart when the P-Wave is being recorded?
P-Wave
- Depolarization of atria in response to SA node triggering
What is happening to the heart when the PR-Wave is being recorded?
PR Interval
- Delay of AV node to allow filling of ventricles
What is happening to the heart when the QRS-Wave is being recorded?
QRS Complex
- Depolarization of ventricles, triggers main pumping contractions
What is happening to the heart when the T-Wave is being recorded?
T-Wave
- Ventricular repolarization
What is happening to the heart when the ST-Wave is being recorded?
ST Segment
- Beginning of ventricle repolarization
- Should be flat
Aortic valve opens
A-V valve closes
Systole
Diastole
Systole
Ventricular Volume
Ventricular Pressure
Atrial Pressure
Aortic Pressure
A-V valve opens
Aortic valve closes
Atrial systole
Diastasis
Rapid inflow
Isovolumic relaxation
Aortic valve opens
Ejection
Isovolumic contraction
Superior vena cava
Sinoatrial (SA) node
“Pacemaker”
Internodal pathway
Atrioventricular (AV) node
Atrioventricular (AV) bundle
(Bundle of His)
Bundle branches
Purkinje fibers
Right atrium