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31 Cards in this Set
- Front
- Back
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SA node (pacemaker)
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fires 75 times
per minute--sinus rhythm |
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AV node
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fires 50 times per minute
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AV bundle and bundle branches--
fire |
30 times per minute
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P wave
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atrial contraction
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QRS complex
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ventricular contraction
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T wave
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ventricular relaxation
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Pulse pressure
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Systolic pressure - diastolic pressure
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Mean Arterial Pressure
|
diastolic
pressure + (pulse pressure / 3) |
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Diastolic pressure
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Pressure of blood in vessels when heart is relaxed
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Systolic pressure
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Pressure of blood in vessels when
heart is contracted |
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When measuring BP with a sphygmomanometer
and a stethoscope the first sound is |
systolic pressure--blood
begins to flow through artery |
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When measuring BP with a sphygmomanometer
and a stethoscope the last sound is |
diastolic pressure--artery
completely open |
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When measuring BP with a sphygmomanometer the brachial artery shall be
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Completely closed
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Heart murmurs
indicate |
backflow through the valve
Valvular insufficiency |
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Heart Sounds
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Lub-dup
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Valves in heart closing
Lub |
AV valves closing
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Valves in heart closing
Dub |
semilunar valves closing
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The Cardiac Cycle
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Systole--contraction--depolarization
Diastole--relaxation--repolarization One complete heartbeat |
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The Cardiac Cycle
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Atrial systole
• Atrial diastole • Ventricular systole • Ventricular diastole |
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|
When measuring BP with a sphygmomanometer
and a stethoscope the first sound is |
systolic pressure--blood
begins to flow through artery |
|
|
When measuring BP with a sphygmomanometer
and a stethoscope the last sound is |
diastolic pressure--artery
completely open |
|
|
When measuring BP with a sphygmomanometer the brachial artery shall be
|
Completely closed
|
|
|
Heart murmurs
indicate |
backflow through the valve
Valvular insufficiency |
|
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Heart Sounds
|
Lub-dup
|
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Valves in heart closing
Lub |
AV valves closing
|
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|
Valves in heart closing
Dub |
semilunar valves closing
|
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The Cardiac Cycle
|
Systole--contraction--depolarization
Diastole--relaxation--repolarization One complete heartbeat |
|
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The Cardiac Cycle
|
Atrial systole
• Atrial diastole • Ventricular systole • Ventricular diastole |
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We calculate heart rate using which method
|
the ECG 1500 method
Count number of small squares from P or R wave to P or R wave and divide into 1500 |
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counting squares
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Small Square: 0.04 sec
Large Square: 0.20 sec 5 Large Squares: 1.0 sec |
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Electrocardiography--ECG
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Monitor elect.currents generated and xmit 's thru heart
Get three deflection waves Size, duration, and timing of deflection waves consistent in healthy heart Changes in pattern may reflect heart damage or problems with conduction system |
