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Updated: Dec 17, 2025
The Intra-Aortic Balloon Pump
Published on: February 5, 2021
Effects of intraaortic balloon counterpulsation on translesional coronary hemodynamics
Arnold H Seto1, Jeannie Yu1, James Iwaz1
1Division of Cardiology, Veterans Administration Long Beach Health Care System, Long Beach, California, USA.
Insights
The intraaortic balloon pump (IABP) augments diastolic pressure and reduces myocardial workload. However, it does not improve blood flow across severe coronary obstructions, as demonstrated by pressure wire data.
Area of Science:
- Cardiovascular physiology
- Medical devices
- Hemodynamics
Background:
- The intraaortic balloon pump (IABP) is a mechanical circulatory support device used to augment diastolic pressure and reduce myocardial workload.
- IABP functions by counterpulsation, inflating during diastole to increase aortic pressure and deflating before systole to decrease afterload.
Observation:
- Previous studies suggest IABP increases coronary flow in non-obstructed vessels but not across severe obstructions.
- Direct measurement of translesional hemodynamics using pressure sensor guidewires to confirm IABP's influence is limited.
Findings:
- This case report illustrates translesional hemodynamics across a severe stenosis using an angioplasty pressure sensor guidewire.
- The study highlights the unique influence of IABP on hemodynamic parameters in the presence of significant coronary artery obstruction.
Implications:
- Understanding IABP's precise hemodynamic effects in severe stenosis is crucial for optimizing its use in critical care.
- Pressure sensor guidewire data provides valuable insights into the efficacy of mechanical circulatory support devices in complex coronary artery disease scenarios.
Abstract:
The intraaortic balloon pump (IABP) provides counterpulsation by displacing a 40-50 cc blood volume during diastole augmenting diastolic pressure. The rapid deflation of the balloon timed to the initiation of systole reduces the afterload of ventricular ejection and thus peak systolic pressure. As a direct result, IABP increases mean arterial pressure (MAP) and peak diastolic pressure while reducing systolic pressure and myocardial work. IABP increases coronary flow velocity in non-obstructed vessels, but does not increase flow across a severe obstruction as shown by intracoronary Doppler flow studies (Kern et al., Circulation, 1993;87:500-511 and Kern et al., Circulation 1991;84:II-485). There are few studies using pressure sensor guidewires to confirm these responses. We present a case illustrating the translesional hemodynamics using an angioplasty sensor pressure wire across a severe stenosis and the unique influence of the IABP.
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