Nino Mihatov1, Ramya C Mosarla2, Ajay J Kirtane3, Sahil A Parikh3, Kenneth Rosenfield4, Siyan Chen5, Yang Song5, Robert W Yeh5, Eric A Secemsky6. 1. Division of Cardiology, Columbia University Irving Medical Center/New York-Presbyterian Hospital, New York, New York, USA; Richard A. and Susan F. Smith Center for Outcomes Research, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA. 2. Division of Cardiology, New York University Langone Health & Grossman School of Medicine, New York, New York, USA. 3. Division of Cardiology, Columbia University Irving Medical Center/New York-Presbyterian Hospital, New York, New York, USA; Cardiovascular Research Foundation, New York, New York, USA. 4. Division of Cardiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA. 5. Richard A. and Susan F. Smith Center for Outcomes Research, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA. 6. Richard A. and Susan F. Smith Center for Outcomes Research, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA. Electronic address: esecemsk@bidmc.harvard.edu.
Abstract
BACKGROUND: Mortality rates for patients presenting with acute myocardial infarction (AMI) and cardiogenic shock (CS) remain high despite advances in revascularization strategies and mechanical circulatory support (MCS) devices. OBJECTIVES: This study sought to elucidate the association between comorbid lower extremity peripheral artery disease (PAD) and outcomes in CS and AMI. METHODS: PAD status was defined in Medicare beneficiaries hospitalized with CS and AMI from October 1, 2015 to June 30, 2018. Primary outcomes ascertained through December 31, 2018 included in- and out-of-hospital mortality. Secondary outcomes included bleeding, amputation, stroke, and lower extremity revascularization. Multivariable regression models with adjustment for confounders were used to estimate risk. Subgroup analyses included patients treated with MCS and those who underwent coronary revascularization. RESULTS: Among 71,690 patients, 5.9% (N = 4,259) had PAD. Mean age was 77.8 ± 7.9 years, 58.7% were male, and 84.3% were White. Cumulative in-hospital mortality was 47.2%, with greater risk among those with PAD (56.3% vs 46.6% without PAD; adjusted OR: 1.50; 95% CI: 1.40-1.59). PAD patients also had greater risk of in-hospital amputation (1.6% vs 0.2%; adjusted OR: 7.0; 95% CI: 5.26-9.37) and out-of-hospital mortality (67.9% vs 40.7%; adjusted HR: 1.78; 95% CI: 1.67-1.90). MCS was less frequently utilized in PAD patients (21.5% vs 38.6% without PAD; P < 0.001) and was associated with higher mortality, need for lower extremity revascularization, and amputation risk. Findings were consistent in patients who underwent coronary revascularization. CONCLUSIONS: Among patients presenting with AMI and CS, PAD was associated with worse limb outcomes and survival. In addition to lower MCS utilization rates, those with PAD who received MCS had increased mortality, lower extremity revascularization, and amputation rates.
BACKGROUND: Mortality rates for patients presenting with acute myocardial infarction (AMI) and cardiogenic shock (CS) remain high despite advances in revascularization strategies and mechanical circulatory support (MCS) devices. OBJECTIVES: This study sought to elucidate the association between comorbid lower extremity peripheral artery disease (PAD) and outcomes in CS and AMI. METHODS: PAD status was defined in Medicare beneficiaries hospitalized with CS and AMI from October 1, 2015 to June 30, 2018. Primary outcomes ascertained through December 31, 2018 included in- and out-of-hospital mortality. Secondary outcomes included bleeding, amputation, stroke, and lower extremity revascularization. Multivariable regression models with adjustment for confounders were used to estimate risk. Subgroup analyses included patients treated with MCS and those who underwent coronary revascularization. RESULTS: Among 71,690 patients, 5.9% (N = 4,259) had PAD. Mean age was 77.8 ± 7.9 years, 58.7% were male, and 84.3% were White. Cumulative in-hospital mortality was 47.2%, with greater risk among those with PAD (56.3% vs 46.6% without PAD; adjusted OR: 1.50; 95% CI: 1.40-1.59). PAD patients also had greater risk of in-hospital amputation (1.6% vs 0.2%; adjusted OR: 7.0; 95% CI: 5.26-9.37) and out-of-hospital mortality (67.9% vs 40.7%; adjusted HR: 1.78; 95% CI: 1.67-1.90). MCS was less frequently utilized in PAD patients (21.5% vs 38.6% without PAD; P < 0.001) and was associated with higher mortality, need for lower extremity revascularization, and amputation risk. Findings were consistent in patients who underwent coronary revascularization. CONCLUSIONS: Among patients presenting with AMI and CS, PAD was associated with worse limb outcomes and survival. In addition to lower MCS utilization rates, those with PAD who received MCS had increased mortality, lower extremity revascularization, and amputation rates.
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