Figure 3. Echocardiographic parameters (end-systolic cross-sectional area, fractional area change, and velocity of circumferential fiber shortening) demonstrate an improvement in left ventricular systolic function for intraaortic balloon counterpulsation-augmented (A) cardiac beats compared to subsequent nonaugmented (N0, N1, N2, and N3) cardiac beats. All values (n = 27) are mean+/-SE. Comparisons were performed using analysis of variance for repeated measures adjusted for multiple comparisons.
