IABP waveforms

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Figure 1a.

Red line represents actual pressure tracing with an initial systolic waveform followed by an pump generated waveform and then the systolic waveform seen following a balloon waveform with reduced systolic pressure

Figure 1b.

Early inflation. May result in premature closure of aortic valve, increase in LVEDV and LVEDP, increased afterload, increased myocardial oxygen demand

Figure 1c.

Late inflation. Results in sub-optimal coronary perfusion.

Figure 1d

Early deflation. Sharp drop following diastolic augmentation. Diastolic augmentation sub-optimal. Results in sub-optimal coronary perfusion, potential for retrograde coronary and carotid blood flow, sub-optimal afterload reduction and increase myocardial oxygen demand.

Figure 1e.

Late deflation. Afterload reduction almost absent. Increased myocardial oxygen demand du to LV ejecting against a greater resistance and a prolonged isovolumic contraction phase. Increased afterload.

©Charles Gomersall, August, 2008 unless otherwise stated. The author, editor and The Chinese University of Hong Kong take no responsibility for any adverse event resulting from the use of this webpage.
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