Rhythm review unit 1

Where do healthy rhythms originate?

Sinus node

What 5 components do you need to analyze a rhythm

regularity, rate, p-wave morphology, PRI, QRS

When we look at whether the QRS intervals equal or not we are measuring what?

Regularity

Rate

ventricular rate or atrial rate

Ventricular Rate

R-wave to R-wave

Atrial Rate

P-wave to p-wave

What are the ways to calculate rate

6 second, 10 second, 300, 1500

What factors do you consider for p-wave morphology

Is p-wave 1:1 with QRS? are the shapes the same? are they coming from the same area? is it followed by a qrs

What factors do you consider for QRS?

Duration: is the complex wide narrow?

Normal duration is <0.12 seconds

morphology: does each qrs look the same, is it wide/narrow.

what does a wide QRS mean?

its taking longer to depolarize the ventricles than normal

1

p -wave

5

t-wave

s-wave

3

4

r-wave

5

t-wave

2

q-wave

ventricular rate is determined by

QRS complex frequency

atrial rate is determined by

p-waves

Layers of the heart inner to outer

endocardium, myocardium, epicardium. Encased in pericardium.

Top two heart chambers

Left atrium, right atrium

bottom two chambers of the heart

Left ventricle right ventricle

Arteries move blood..

away from the heart

veins move blood

towards the heart

Ventricular systole

heart contracts to pump blood out

Ventricular diastole

heart relaxing and filling with blood

Atrial systole

Atrial kick

Atrial diastole

Occurs during ventricular systole

pulmonary circulation

blood to and from the lungs

systemic circulation

blood flow to the body

coronary circulation

blood flow to the heart