Author + information
- Kalpa De Silva,
- Balrik Kailey,
- Jordi Alastruey–Arimon,
- Matthew Lumley,
- Michael Marber,
- Sven Plein,
- Simon Redwood and
- Divaka Perera
Left ventricular (LV) dysfunction is often seen in acute coronary syndromes (ACS) and high–risk percutaneous coronary intervention (PCI). Wave intensity analysis (WIA) quantifies energy flux within the circulation. We used WIA to examine the hemodynamic perturbations following ACS and PCI with adjunctive intra–aortic balloon pump (IABP).
Patients with NSTEMI, or scheduled PCI with >2 vessel disease and LVEF <40% had simultaneous intra–coronary pressure–Doppler assessment. In the ACS group the target vessel (TV) and a remote reference vessel were assessed with LV function and late–gadolinium enhancement (LGE) assessed by cardiac MRI, pre– and 3–months post–PCI. In the PCI+IABP group, TV was assessed during unassisted and 40cc–IABP–assisted settings.
33 patients were recruited, 22 NSTEMI (LVEF 56±11% and LGE mass 8.4±6.0%) and 11 PCI+IABP (LVEF 34±7%). TV BEW inversely correlated to LGE (r =–0.81, p<0.0001) and predicted regional LV recovery (r = 0.68, p=0.001). By ROC analysis, BEW predicted functional recovery with an accuracy of 88%. IABP resulted in a 12.7% (p=0.04) and 28% (p<0.001) increase in diastolic pressure, and flow velocity (DFV) respectively. A WIA derived early–diastolic wave, corresponding with IABP inflation, was proportional to DFV (r=0.72, p=0.001).
BEW correlates with magnitude and location of infarction, and may predict functional recovery following ACS. WIA uniquely assesses the physiological efficacy of mechanical assist devices.
Special Session North, Room 120
Sunday, March 10, 2013, 11:00 a.m.–11:15 a.m.
Session Title: Young Investigator Awards Competition: Physiology, Pharmacology and Pathology
Abstract Category: Physiology, Pharmacology, Pathology
Presentation Number: 403–5
- 2013 American College of Cardiology Foundation