Echocardiographic parameters of left ventricular non-systolic function
predict length of stay following coronary artery bypass graft -- a
prospective observational study
Abstract
Background: Abnormal left ventricular (LV) echocardiographic parameters
during non-systolic phase, with or without a diagnosis of heart failure,
is a common finding that can be easily diagnosed by intra-operative
transesophageal echocardiography (TEE). However, its association with
duration of hospital stay after coronary artery bypass (CAB) is unknown.
Objective: To determine if Abnormal left ventricular (LV)
echocardiographic parameters during non-systolic phase is associated
with length of hospital stay after coronary artery bypass surgery (CAB).
Method: Prospective observational study at a single tertiary academic
medical center Result: Median time to hospital discharge was
significantly longer for subjects with abnormal left ventricular (LV)
echocardiographic parameters during non-systolic phase (9.1/IQR 6.6-13.5
days) than those with normal LV non-systolic function (6.5/IAR
5.3-9.7days) (P< 0.001). The probability of hospital discharge
was 34% lower (HR 0.66/95% CI 0.47-0.93) for subjects with abnormal LV
function even during non-systole despite a normal LV systolic function,
independent of potential confounders, including a baseline diagnosis of
heart failure Conclusions and Relevance: In patients with normal
systolic function undergoing CAB, non-systolic LV dysfunction is
associated with prolonged duration of postoperative hospital stay. This
association cannot be explained by baseline comorbidities or common
post-operative complications.