Question

17. The following results belong to a patient who visited his cardiologist:

Systolic Blood Pressure: 127

Diastolic Blood Pressure: 99

Heart Rate: 105bpm

Stroke Volume: 0.07L

Answer the following based on the information provided (show your work and use appropriate units):

1. What is the patient’s cardiac output in mL/min?
2. What is the patient’s mean arterial pressure?
3. Is the patient hypertensive? If so to what degree?
4. How would you classify the patient’s heart rate?

18. The following results belong to a patient who visited his cardiologist:

Systolic Blood Pressure: 119

Diastolic Blood Pressure: 78

Heart Rate: 55 bpm

Stroke Volume: 0.065L

Answer the following based on the information provided (show your work and use appropriate units):

1. What is the patient’s cardiac output in mL/min?
2. What is the patient’s mean arterial pressure?
3. Is the patient hypertensive? If so to what degree?
4. How would you classify the patient’s heart rate?

Answer 1

QUESTION 17

Given,

Systolic blood pressure: 127

Diastolic blood pressure: 99

Heart rate: 105 bpm

Stroke volume: 0.07 L

a. Cardiac output: It is the volume of blood the heart pumps per minute. It can be calculated by multiplying the stroke volume with heart rate.

Cardiac output = Stroke volume × Heart rate

= 0.07 × 105

= 7.35 L = 7350 mL/min

Patient's cardiac output = 7350 mL/min

b. Mean arterial pressure: It is calculated by doubling the diastolic blood pressure and adding it to the systolic blood pressure and dividing the sum by 3 (mean arterial pressure is the product of cardiac output, vascular resistance and venous pressure).

Mean arterial pressure (MAP) = 2 (DSP) + SBP ÷ 3

MAP = 2 (99) + 127 ÷ 3

= 108 mm Hg

Patient's mean arterial pressure (MAP) = 108 mm Hg

c. Yes, the patient is hypertensive because, the normal blood pressure range is 120/80 mm Hg. 120 (upper) number indicates 'systolic blood pressure' and 80 (lower) number indicates 'diastolic blood pressure'. The blood pressure exceeding the normal value of 120/80 mm Hg is considered as 'hypertension'.

As the patient's blood pressure reading is 127/99 mm Hg, it indicates "hypertension stage 2" i.e., the patient is at the second stage of high blood pressure.

d. Heart rate can have two conditions: 'Bradycardia' and 'Tachycardia'. Bradycardia is a condition of heart rate below 60 beats per minute and Tachycardia is a condition of heart rate above 100 beats per minute. As the patient's heart rate reading is 105 bpm (i.e., above 100), it can be classified as 'Tachycardia'.

QUESTION 18

Given,

Systolic blood pressure: 119

Diastolic blood pressure: 78

Heart rate: 55 bpm

Stroke volume: 0.065 L

a. Cardiac output: It is the volume of blood the heart pumps per minute. It can be calculated by multiplying the stroke volume with heart rate.

Cardiac output = Stroke volume × Heart rate

= 0.065 × 55

= 3.57 L = 3570 mL/min

Patient's cardiac output = 3570 mL/min

b. Mean arterial pressure: It is calculated by doubling the diastolic blood pressure and adding it to the systolic blood pressure and dividing the sum by 3 (as mean arterial pressure is the product of cardiac output, vascular resistance and venous pressure).

Mean arterial pressure (MAP) = 2 (DBP) + SBP ÷ 3

MAP = 2 (78) + 119 ÷ 3

= 92 mm Hg

Patient's mean arterial pressure (MAP) = 92 mm Hg

c. No, the patient is not hypertensive because, the normal blood pressure range is 120/80 mm Hg. 120 (upper) number indicates 'systolic blood pressure' and 80 (lower) number indicates 'diastolic blood pressure'. The blood pressure readings above 90/60 mm Hg and below 120/80 mm Hg indicates that the blood pressure is normal. As the patient's blood pressure reading is 119/78 mm Hg, it is considered as "normal blood pressure'.

d. Heart rate can have two conditions: 'Bradycardia' and 'Tachycardia'. Bradycardia is a condition of heart rate below 60 beats per minute and Tachycardia is a condition of heart rate above 100 beats per minute. As the patient's heart rate reading is 55 bpm (i.e., below 60), it can be classified as 'Bradycardia'.

Thank you!