Cardiovascular (REVIEW TEST) Flashcards Preview

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Flashcards in Cardiovascular (REVIEW TEST) Deck (59)
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1

A 53 y/o woman is found, by arteriography to have 50% narrowing of her left renal artery what is the expected change in bloodflow through the stenotic artery 

1/16

  • decreased by 24

2

When a person moves from supine to standing position. 

Increased contractility

3

At which site is sytolic BP the highest ?

renal artery

4

A persons ECG has no p wave but has normal QRS and a normal T wave. therefore his pacemaker is located in the

AV node

5

If the ejection fracion increases, there will be a decrease in 

End systolic volume

6

An ECG shows ventricular extrasystoles

An extrasystolic beat would produce

Decreased pulse pressure because stroke volume is decreased

7

After an extrasystole, the enxt normal ventricular contraction produces

Increased oulse presssure because the contractility of the venricle is increased

8

An increae in contractility is demonstrated on a Frank starling diagram by

Increased cardiac output for a given end diastolic volume

9

On the graph left ventricular volume and pressure, isovilumentric conraction occurs

1-2

10

The aortic valve closes at point

point 3

11

The first heart sound corresponds to point

point 4

12

if the heart rate is 70 bpm, then the CO of this ventricle is closest to

5.25 L/min

 

13

In a capillary Pc is 30 mmHg, Pi is -2mmHg. and πc is 25 mmHg and πi is 2mmHg

What is the direction of fluid movement and the net driving force?

Filtration; 9 mmHg

(Pc-Pi) - (πc-πi)

30-(-2) -(25-2) mmHg

14

In a capillary Pc is 30 mmHg, Pi is -2mmHg. and πc is 25 mmHg and πi is 2mmHg

if Kf is 0.5 ml/min/mmHg, what is the rate of water flow across the capillary wall?

4.50 mL/min

Kf x net pressure

0.5 ml x 9

15

The tendency for blood flow to be turbulent is increased by

Partial occlusion of a blood vessel

16

A 66 y/o man who has had a sympathectomy, xperiences a greater than normal fall in arterial pressure upon standing up. The explaination for this is 

A suppressed response of the baroreceptor mechanism

17

The ventricles are completely depolarized during which isoelectric portion of the ECG?

ST segment

18

In which of the ff situations is pulmonary blood flow greater than aortic blood flow?

Left to right ventricular shunt

19

The change indicated by the dashed lines on the cardiac output/venous return curves

Increased mean systemic pressure

20

A 30 y/o female patient's ECG shows two P waves preceding each QRS complex. the interpretation for this is

Decreased conduction through AV node

21

An acute decrease in arterial blood pressure elicits which of the following compensatory changes

Decreased firing rate of the caortid sinus

22

The tendency for edema to occur will be increased by

Increased venous pressure

23

Inspiration splits the second heart sound because

the aortic valve closes before the pulmonic valve

24

During exercise, total peripheral resistance decreases because of the 

Local metabolites on skeletal muscle

25

Curve A in the figure

Aortic pressure

26

Curve B in the figure

Ventricular volume

27

An increase in arteriolar resistance, without a change in any other component of the cardiovascular system will produce

an increase in arterial pressure

28

The following easurements were obtained

  • CVP 10 mmHg
  • HR: 70bpm
  • Systemic arterial oxygen - 0.24 ml 
  • Mixed venous = 0.16
  • Whole body Oxygen consumption : 500 ml/min

What is the cardiac output?

8.00 L/min

29

Which of the ff is the result of an inward sodium current

Upstroke of the action potential in Purkinje fibers

30

The dashed line in the figure illustrates the effect of 

Increased contractility