Intra-Aortic Balloon Pumps Questions

Intra-Aortic Balloon Pumps Questions and Verified Answers, 100% Score Guarantee Pass (Latest 2025) Label an aortic pressure waveform - Correct Answers ✅ When are coronary arteries perfused? - Correct Answers ✅ventricular diastole Determinants of myocardial oxygen supply and demand - Correct Answers ✅ Phases/Progression of Left Ventricular Failure - Correct Answers ✅1. Vasoconstriction (decrease pumping efficiency, increase LV volume & pressure, activation of baroreceptors, increase HR, release of catecholamines, increase SVR/afterload, increase O2 demand, increase preload)

• Hypervolemia (decrease CO, decrease GFR, activation of

RAAS, ADH release, increase Na & H2O reabsorption, increase preload and afterload, increase O2 demand, decrease CO, increase HR, decrease O2 supply, increases PAP)

• Tissue Hypoxia (pulmonary edema, decrease oxygenation,

decrease contractility, decrease CO, decrease BP, anaerobic metabolism, lactic acid production, tissue acidosis, tissue anoxia, death) 1 / 4

Intra-Aortic Balloon Pumps Questions and Verified Answers, 100% Score Guarantee Pass (Latest 2025) IABPs typically increase cardiac output by how many liters? - Correct Answers ✅1 - 1.5 liters When are IABPs inserted in axillary artery vs. femoral artery?

• Correct Answers ✅Axillary
• on transplant waiting list
• need for patients to be mobile

Femoral

• during emergent/surgical insertion
• patients don't need to be mobile

What are the IABP fiber optic catheter sizes? - Correct

Answers ✅40 cc: patients shorter than 5'4"

50 cc: patients that are 5'4" and taller

(smaller catheter available for pediatrics) When does an IABP inflate and deflate? - Correct Answers

✅Inflate: at dicrotic notch (closure of aortic valve and onset

of diastole) 2 / 4

Intra-Aortic Balloon Pumps Questions and Verified Answers, 100% Score Guarantee Pass (Latest 2025)

Deflate: just prior to next systolic phase

What percentage of the aorta should an IABP fill? How does age impact this? - Correct Answers ✅Want balloon to fill ~ 80% of aorta

- older patients: aortas are stiff

- younger patients: aorta keep stretching with balloon (not

ideal) Primary effects of IABP therapy - Correct Answers ✅1.Increase myocardial oxygen supply (IAB inflation)

• Decrease myocardial oxygen demand (IAB deflation -

decrease afterload; heart doesn't need to work as hard) Secondary effects of IABP therapy - Correct Answers ✅- Cardiac output

• Heart rate

- PAD - PCWP

• SVR
• BP (systolic, diastolic, MAP, diastolic augmentation) 3 / 4

Intra-Aortic Balloon Pumps Questions and Verified Answers, 100% Score Guarantee Pass (Latest 2025) Label an arterial waveform during IABP therapy (unassisted systole, unassisted aortic end diastolic pressure, diastolic augmentation, assistive aortic end diastolic pressure, assisted systole) - Correct Answers ✅ With IABP therapy, how should unassisted vs. assisted pressures compare? - Correct Answers ✅- Assisted systole should be 10 - 15 mmHg less than unassisted systole (decrease afterload/myocardial demand)

• Assisted end diastolic pressure should be 10 - 15 mmHg less

than unassisted end diastolic pressure (decrease afterload/myocardial demand)

• Diastolic augmentation (inflation at diastole) should be 10 -

15 mmHg greater than unassisted systole What is the purpose of diastolic augmentation? - Correct Answers ✅Diastolic augmentation = inflation of the balloon in the aorta during diastole (counterpulsation) Purpose is to increase coronary perfusion, as well as perfusing end-organs better/at a higher pressure

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