Cardiovascular System Flashcards

1
Q

Duration of PR interval of ECG (HR: 75/min)

A

0.2 s

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2
Q

Duration of P wave of ECG (HR: 75/min)

A

0.1 s

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3
Q

Duration of QRS complex of ECG (HR: 75/min)

A

0.1 s

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4
Q

Duration of QT interval

A

0.4 sec

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5
Q

Amplitude of ST-segment of ECG (isoelectric)

A

+/- 0.1 mV

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6
Q

Amplitude of R and T waves of ECG in II. lead

A
  • R wave: 1.5 mV
  • T wave: 0.5 mV
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7
Q

RR interval

A

0.8 s

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8
Q

Duration of cardiac cycle (HR: 75/min)

A

0.8 s

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9
Q

Duration of systole (HR: 75/min)

A

0.27 s

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10
Q

Duration of diastole (HR: 75/min)

A

0.53 s

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11
Q

Duration of ventricular ejection (HR: 75/min)

A

0.25 s

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12
Q

Duration of ventricular filling (HR: 75/min)

A

0.3 s

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13
Q

Stroke volume

A

70 ml

End-diastolic volume: 140 ml

End-systolic volume: 70 ml

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14
Q

Systolic pressure in the aorta

A

120 mmHg

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15
Q

Diastolic pressure in the aorta

A

80 mmHg

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16
Q

Right ventricular pressure

A
  • Systole: 25 mmHg
  • Diastole: 5 mmHg
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17
Q

Left ventricular pressure

A
  • Systole: 120 mmHg
  • Diastole: 10 mmHg (less that 10!)
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18
Q

Pulmonary artery pressure

A
  • Systole: 25 mmHg
  • Diastole: 8 mmHg
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19
Q

Central venous pressure (CVP)

A

5 mmHg

20
Q

Mean blood pressure in pulmonary circulation

A

14 mmHg

21
Q

Blood pressure in left atrium

A

8 mmHg

22
Q

Driving blood pressure in pulmonary circulation

A

14-8 = 6 mmHg

23
Q

Kidney

A

Blood flow:

  • 25% (of CO) rest
  • 4% exercise

AVDO2: 15 mlO2/L (350ml/100g/min)

24
Q

Splanchnic area

A

Blood flow:

  • 25% rest
  • 5% exercise

AVDO2: 35 mlO2/L

25
Q

Brain

A

Blood flow:

  • 15% rest
  • 4% exercise

AVDO2 in the brain: 60 mlO2/L

26
Q

Heart

A

Blood flow:

  • 5% rest (250 ml/min)
  • 5% exercise

AVDO2 (oxygen extraction):

  • Resting condition: 120 mlO2/L
  • Physical exercise: 500 mlO2/L (not sure)

O2 consumption:

  • 30 mlO2/min resting (whole body 250 mlO2/min)
27
Q

Skin

A

Blood flow:

  • 5% rest
  • 10% exercise (not sure)

AVDO2: 20-30 mlO2/L

28
Q

Skeletal muscle

A

Blood flow:

  • 25% rest
  • 75% exercise (not sure)

AVDO2:

  • Resting: 60 mlO2/L
  • Physical exercise: 150 mlO2/L
29
Q

Oxygen consumption in 1 minute

A

250 ml/min

30
Q

AVDO2 in the systemic circulation

A

50 mlO2/L

31
Q

Cerebrospinal fluid (CSF) volume

A

150 ml

32
Q

Protein concentration of cerebrospinal fluid

A

15-45 mg/dL

33
Q

Hydrostatic pressure of interstitial fluid

A

-2 mmHg

34
Q

Hydrostatic pressure of capillaries

A
  • Arteriolar end: +36 mmHg
  • Venular end: +16 mmHg
35
Q

Effective filtration pressure of capillaries

A
  • Arteriolar end: +12 mmHg
  • Venular end: -4 mmHg
36
Q

Rate of lymph production

A

120 ml/hour

37
Q

Hematocrit (Ht or HCT)

A

Normal value: 37-50%

38
Q

Ejection fraction

A

55%

39
Q

Cardiac output (CO)

A

5000 ml/min

40
Q

Normal sinus rhythm

A

60-100 impulses per minute

41
Q

Atrial, ventricular and Purkinje fibers action potential

A

From -85 mV to +20 mv

42
Q

SA node action potential

A

From -65 mV (maximum diastolic potential) to about +10 mV

43
Q

Chronotropic effects

A

The effects of the autonomic nervous system on heart rate are called chronotropic effects.

44
Q

Dromotropic effects

A

The effects of the autonomic nervous system on conduction velocity are called dromotropic effects.

45
Q

Ionotropic effect

A
  • Agents that produce an increase in contractility are said to have positive inotropic effects. Positive inotropic agents increase both the rate of tension development and the peak tension.
  • Agents that produce a decrease in contractility are said to have negative inotropic effects. Negative inotropic agents decrease both the rate of tension development and the peak tension.