Basic Cardiac Physiology

Question 1

Pulse pressure

Answer 1

Systole - Diastole

Question 2

MAP

Answer 2

(2/3 Diastole) + (1/3 Systole)

Question 3

CVP

Answer 3

Right Atrial Pressure

Question 4

Normal pressure at the various parts of the adult circulation

Answer 4

Large arteries:

Question 5

Physiologic basis for normal ECG tracing

Answer 5

P-wave: atrial depolarization
QRS: ventricular depolarization
T-wave: ventricular depolarization

Question 6

Ang master ng mga Pacemakers

Answer 6

Sinoatrial node

Question 7

Cause of SA node depolarization

Answer 7

Calcium influx

Question 8

Types of 2nd degree AV

Answer 8

Mobitz 1 and Mobitz 2

Question 9

2nd degree AV block with prolongation of PR intervalbefore dropped QRS complex

Answer 9

Mobitz 1 (Wenkebach)

Question 10

2nd degree AV block without prolongation of PR intervalbefore dropped QRS complex

Answer 10

Mobitz type 2

Question 11

Most metabolic organ? Most efficient extractor of oxygen?

Answer 11

Brain; Heart

Question 12

Bainbridge reflex

Answer 12

Increase in venous return will increase the heart rate

Question 13

Frank-Starling mechanism

Answer 13

An increase in venous return will increase the stroke volume

Question 14

AV block that causes fainting due to the initially suppresed state of the Purkinje fibers

Answer 14

Stokes-Adam syndrome

Question 15

Hypertension, irregular respiration and bradycardia due to activation of the CNS ischemic response and baroreceptor reflex in patients with increased ICP

Answer 15

Cushing reflex

Question 16

Ohm’s Law

Answer 16

BP=CO x TPR

CO= HR x SV