Alterations in right ventricular pumping in patients with atrial septal defect at rest and during dobutamine stress

Table 1 Longitudinal, lateral and septal contribution to stroke volume in patients with atrial septal defect (ASD) and healthy controls at rest and during dobutamine stress.

	ASD patients preop at rest	ASD patients during dobutamine stress	ASD patients postop at rest	Controls at rest	Controls during dobutamine stress
HR (bpm)	73±11	124±11***	63±6°°	65±10	130±12***
CO (L/min)	4.8.±0.9	8.8±2.8***	5.1±1.2	7.0±1.5	11.8±2.1***
Longitudinal contribution to LVSV (%)	63±12	56±10	56±9°	61±7	45±7***
Longitudinal contribution to RVSV (%)	75±12	61±12**	83±12°	79±9	57±10***
Lateral contribution to LVSV (%)	39±12+	46±13	38±8	31±8	46±7***
Lateral contribution to RVSV (%)	31±7	38±7*	27±10	29±7	39±10**
Septal contribution to LVSV (%)	-2±13++	-5±12	6±6°	7±4	0±6***

HR, heart rate; CO, cardiac output; LVSV, left ventricular stroke volume; RVSV, right ventricular stroke volume.
*p<0.05, **p<0.01, ***p<0.001 when comparing dobutamine stress to rest for both patients with ASD and healthy controls.
+p<0.05, ++p<0.01, when comparing patients with ASD preoperatively to healthy controls at rest.
°p<0.05, °°p<0.01, when comparing ASD patients postoperatively and preoperatively.

ISSN: 1532-429X