N450 Hemodynamic-Questions with Correct Answers/Verified/ Latest Update 2024/2025
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Course
N450
Institution
N450
Three components of hemodynamic monitoring -️️pressure, flow, and oxygenation
Three different functions the heart does -️️It's a pump, it's an organ, and it has its own
electrophysiological component
Electrophysiological pathway of the heart -️️SA node, internodal pathways, AV node, ...
N450 Hemodynamic-Questions with Correct Answers/Verified/ Latest
Update 2024/2025
Three components of hemodynamic monitoring - ✔️✔️pressure, flow, and oxygenation
Three different functions the heart does - ✔️✔️It's a pump, it's an organ, and it has its own
electrophysiological component
Electrophysiological pathway of the heart - ✔️✔️SA node, internodal pathways, AV node, Bundle of
HIS, L&R bundle branches, purkinjie fibers
Depolarization - ✔️✔️Contraction.
(The process during the action potential when sodium is rushing into the cell causing the interior to
become more positive.)
Repolarization - ✔️✔️Resting.
Return of the cell to resting state, caused by reentry of potassium into the cell while sodium exits the
cell.
AV valves - ✔️✔️Tricuspid & Bicuspid (or mitral) (tri before you bi)
Semi-lunar valves - ✔️✔️pulmonary and aortic
S1 - ✔️✔️Closing of AV valves, beginning of systole. Louder and longer than S2 (Lub)
S2 - ✔️✔️AV valves are open. End of systole, beginning of diastole (Dub)
SA Node heart rate - ✔️✔️60-100 bpm
AV node heart rate - ✔️✔️40-60 bpm
Purkinjie fibers heart rate - ✔️✔️20-40 bpm
, P wave represents - ✔️✔️atrial depolarization (contraction).
Should be upright. 0.06-0.12 seconds.
Variation: Disturbance in conduction w/in atria.
QRS complex - ✔️✔️<0.03 seconds
ventricular depolarization. Represents time taken for depolarization of both ventricles.
MI may result in development of Q wave wider than or equal to >0.03 seconds
T wave represents - ✔️✔️ventricular repolarization (relaxation). Should be upright & well rounded.
Less than half the height of the QRS complex.
Disturbances caused by electrolyte imbalance, ischemia, or infarction.
PR interval time - ✔️✔️0.12-0.20 seconds. Measure from beginning of P wave to beginning of QRS.
variation: Disturbance in conduction usually in AV node, bundle of His, or bundle branches. Can be
atria as well.
QRS interval time - ✔️✔️0.06-0.12 seconds
pulse pressure - ✔️✔️difference between systolic and diastolic pressure (normally about 1/3 of
SBP)
increased? exercise or atherosclerosis of larger arteries.
decreased? heart failure or hypovolemia
Mean Arterial Pressure (MAP) - ✔️✔️The average pressure within the arterial system felt by the
organs in the body
MAP calculation - ✔️✔️(SBP + 2DBP)/3
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