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EKG BP BP MathCardiophysDiseases 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

70

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 ____

HR

PP = ____ - DBP

SBP

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

When the heart is beating at a rate of 75 times per minute, the duration of one cardiac cycle is _____ second(s)

0.8

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

Aortic Aneurysm (abdominal)

Cardiac Arrest

Hypertension

Shock

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