CVR 6

Question 1

Three important aspect of the cardiac cycle?

Answer 1

pressure vs time
Pressure vs …
valvular action

Question 2

Whats a severe heart rate

Answer 2

200 bpm

Question 3

Whats teh normal duration of cardiac cycle?

Answer 3

.8 sec with 72 bpm

Question 4

What is systole and diastyole?

Answer 4

Diastole is when the chamber fills up. Relaxation phase. .5 sec

Systole is contraction. .3 sec.

Question 5

Short diastolic time has a negative impact on?

Answer 5

ventricular filling and coronary blood flow

Question 6

Whats the systemic pressure?

Answer 6

120/80 mm Hg

Question 7

When atria fills what are closed?

Answer 7

the AV are closed

Question 8

Where must more pressure be generated?

Answer 8

Left side

Question 9

Where must more pressure be generated?

Answer 9

Left side

Question 10

What are heart sounds 1 and 2?

Answer 10

1 are AV valve closing which is the end of the ventricular diastole and onset of systole

2 is outflow valve closure pulmonary and aortic end ventricular systole and onset of diastole

Question 11

What can a 3rd heart sound mean?

Answer 11

rapid filling of ventricles. benign in youth, some athletes, some pregnants.

Question 12

What heart murmurs?

Answer 12

Diastolic - occur at S2 and S1. usually to do with aortic regurgitation and mitral stenosis.

Question 13

How do you read a left ventricular pressure volume relationship?

Answer 13

A = ventricular diastole
B = ventricular contraction when volume is the same - valves are closed
C ventricular ejection
D = Closed ventricular relaxation

Question 14

Average stroke volume

Answer 14

EDV - ESV (normal 50 - 70ml)

Question 15

Why is left ventricular end diastolic pressure important?

Answer 15

LVEDP

Question 16

How can we measure pressures in the vena cava

Answer 16

jugular vein

Question 17

Name the waves?

Answer 17

P = The first deflection of the heartbeat is a small upward wave called the P wave. It indicates atrial depolarisation
Q = When visible, the Q wave is any initial downward deflection after the P wave. The normal Q wave represents septal depolarisation.
R = The R wave is the first upward deflection after the P wave (even when Q waves are absent). The R wave is normally the easiest waveform to identify on the ECG and represents early ventricular depolarisation.
S = The S wave is the first negative deflection after the R wave. It represents the late ventricular depolarisation.
T = The T wave represents repolarisation of the ventricles. It is normally upright, somewhat rounded, and slightly asymmetric. Its morphology will alter with breath holding and digitalis toxicity.