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  • Title: Risk factors for profuse systemic-to-pulmonary artery collateral burden in hypoplastic left heart syndrome.
    Author: Prakash A, Satiroglu E, Porras D, McElhinney DB, Keane JF, Lock JE, Geva T, King W, Powell AJ.
    Journal: Am J Cardiol; 2013 Aug 01; 112(3):400-4. PubMed ID: 23642507.
    Abstract:
    Risk factors for developing systemic-to-pulmonary artery collaterals (SPCs) in hypoplastic left heart syndrome (HLHS) are unknown. We performed a retrospective case-control study to identify risk factors for developing a profuse SPC burden in HLHS. Angiograms of 439 patients with HLHS (performed <2 years of age) were reviewed using a previously published angiographic grading scale to identify cases (profuse SPC burden, n = 20) and controls (no or minimal SPC burden, n = 35). In univariate analyses, profuse SPC burden was associated with mitral atresia and aortic atresia subtype (MA/AA) (65% vs 14%, p <0.0001), use of a Sano shunt (70% vs 37%, p = 0.03), longer log-transformed durations of intensive care unit stay (p = 0.02), hospital stay (p = 0.002), pleural drainage (p = 0.008) after stage 1 palliation, lower oxygen saturation at discharge after stage 1 palliation (82 ± 4 vs 85 ± 4%, p = 0.03), and a history of severe shunt obstruction (37% vs 11%, p = 0.04). In a multivariate logistic regression model, profuse SPC burden was associated with MA/AA subtype (odds ratio 6.6), Sano shunt type (odds ratio 8.6), and log-transformed duration of hospital stay after stage 1 (odds ratio 7.9, model p <0.0001, area under the curve 0.88). Nonassociated parameters included fetal aortic valve dilation, severe cyanotic episodes, number of days with open sternum or number of additional exploratory thoracotomies after stage 1 palliation, pulmonary vein stenosis, and restrictive atrial septal defect. In conclusion, in the present case-control study of patients with HLHS, the development of a profuse SPC burden was associated with MA/AA subtype, Sano shunt type, and longer duration of hospital stay after stage 1 palliation.
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