Cardiologic Concepts (Exam 1) Flashcards
PR Interval
0.12-0.20s
QRS
0.06-0.10s
QTc Interval
0.44s
Ventricular Depolarization
QRS
Depolarization of Atria
P Wave
1 Block
0.04s
Depolarization is _____.
Slow
Repolarization is _____.
Fast
ST
0.08s
T Wave
0.10s
Determine HR Formula
1500 divided by small squares between R waves.
P Wave
0.08-0.10s
Atrial Contraction Phase 1
AV Valves Open, Semilunar Valves Closed
Rapid flow of blood into the ventricles.
Ventricular volumes are maximal.
End-Diastolic Volume
What heart sound is sometimes heard during Atrial Contraction Phase 1?
S4 (Stiff Ventricle) common in older adults.
Isovolumetric Contraction Phase 2
All Valves Closed
What sound is heard during Isovolumetric Contaction Phase 2?
S1 (Closure of AV Valves) Normal sound.
What sound is caused by the closure of aortic and pulmonic valves and is heard in Isovolumetric relaxation phase 5?
S2 (Normal Sound)
What heart sound is heard during rapid filling phase 6?
S3 (Tensing chordae tendinae and atrioventricular ring) Normal in children not in adults.
Rapid Ejection Phase 3
Aortic and Pulmonic Valves Open, AV Valves Closed
Reduced Ejection Phase 4
Aortic and Pulmonic Valves Open, AV Valves Closed
Isovolumetric Relaxation Phase 5
All Valves Closed
The volume of blood that remains in a ventricle is called.
End-Systolic Volume
Rapid Filling Phase 6
AV Valves Open
Reduced Filling Phase 7
AV Valves Open
