EKG/Blood Pressure

What are the 3 waves of an EKG ?i i

1. P wave

2. QRS wave

3. T wave

What happens during the p wave ?i i

1. Atria contract

What happens during the QRS wave ?i i

1. Impulse travels through the ventricles

What happens during the T wave ?i i

1. Diastole begins

What does an EKG test ?i i

1. An EKG tests the hearts ability to transmit an electrical impulse from the SA node to the purkinje fibers

What are the 4 parts the impulse travels to ?i i

1. Sinoatrial node

2. Atrioventricular node

3. Bundle of His

4. Purkinja fibers

What is systolic pressure, what does it contract (2) ?i i

1. Max pressure

2. Contraction of ventricles

What is diastolic pressure, what relaxes (2) ?i i

1. Lowest pressure

2. Ventricles relax

How is blood pressure written ?i i

1. Systolic pressure over diastolic pressure

What is normal blood pressure ?i i

1. 120/80

What is stage 1 hypertension blood pressure ?i i

1. 130-139/80-89

What is stage 2 hypertension blood pressure ?ini

1. 140+/90+

What units does stroke volume use ?i i

1. Milliliters/minute (volume of blood being pumped per minute)

What units does heart rate use ?i i

1. Beats/minute

How do you calculate cardiac output ?i i

1. Cardiac output = stroke volume x heart rate