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EKG BP BP Math Cardiophys Diseases

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EKG Pics

The P wave of a normal

electrocardiogram indicates ______

atrial depolarization

Which of the following is not part

of the conduction system of the heart?

a) AV node

b) Bundle of His

c) AV valve

d) SA node

The second heart sound is heard

during which phase of the cardiac cycle?

Isovolumetric relaxation

What do these intervals represent?

P wave

PR interval

QRS complex

ST segment

T wave

U wave

RR interval

P wave – atrial depolarization

PR interval – time from SA to AV node

QRS complex – ventricular depolarization

ST segment – beginning of ventricular repolarization

T wave – ventricular repolarization

U wave – final component of ventricular repolarization

RR interval – complete time of one cardiac cycle

What is the normal time span for the

PR interval?

0.12 – 0.20s

In what units is blood pressure

expressed?

In millimeters of mercury (mm Hg)

The stroke volume for a normal

resting heart is ____ mL/beat

Define systole and diastole

Systole is contraction of the muscle

Diastole is relaxation of the muscle

What is ventricular systole?

Contraction of the ventricles

What do the sounds correspond to when

blood pressure is taken?

The first sounds that are heard indicate systolic

pressure. When the sounds stop, diastolic pressure has

been reached

A. SA node

B. AV node

C. AV bundle

D. Bundle branches

E. Purkinje fibers

A. normal sinus rhythm

B. junctional rhythm

C. second-degree heart block

D. ventricular fibrillation

Ventricular tachycardia

First degree heart block

Bradycardia, sinus rhythm

CO = SV x ____

PP = ____ - DBP

Calculate the mean blood pressure when systolic blood pressure is 120 mm Hg and the diastolic blood pressure

is 80 mm Hg

93 mm Hg

Calculate stroke volume when pulse

pressure is 50 mm Hg

100 mL/beat

Calculate cardiac output when stroke volume is 100

mL/beat and heart rate is 68 beats/minute. Convert the

value in liters per minute by multiplying by 1L/1000 mL

6,800 L/min

Define the terms end diastolic volume (EDV) and end systolic volume

(ESV) and relate them to the calculation of stroke

volume

EDV is the amount of blood that collects in a ventricular during diastolic. ESV is the volume of blood remaining in a ventricular after it has contracted. Stroke volume

(mL/beat) equals EDV-ESV

Damage to the _____ is referred to as a heart block

a)SA node

b)AV valves

c)AV bundle

d)AV node

d) AV node

When the heart is beating at a rate of 75 times per minute, the

duration of one cardiac cycle is _____ second(s)

Which of the following is the most important when considering aerobic

exercise?

a)Duration of 20 – 40 minutes

b)Duration of >60 minutes

c)Intensity

d)Frequency of 3 – 4 times per week

e)Frequency of 5 – 7 times per week

C) intensity

What is the best way to look at a P wave?

Lead II

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Aortic Aneurysm

(abdominal)

Cardiac Arrest

Hypertension

A 47-year old male with a long history of palpitations and, lately, blackouts

Wolf-Parkinson White

Make your wager

What are the 12 leads of the standard

EKG cycle?

3 Bipolar Leads

3 Augmented Leads

6 Precordial (chest) Leads