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Prediction usefulness of a 5-level score In determining outcomes after cardiac rehabilitation
Session:
Sessão de Comunicações Orais 08 – Reabilitação Cardíaca como terapia: recuperação funcional na doença cardiovascular avançada
Speaker:
João Fernandes Pedro
Congress:
CPC 2026
Topic:
J. Preventive Cardiology
Theme:
29. Rehabilitation and Sports Cardiology
Subtheme:
29.2 Cardiovascular Rehabilitation
Session Type:
Comunicações Orais
FP Number:
---
Authors:
João Fernandes Pedro; Daniel Inácio Cazeiro; João Cravo; Marta Vilela; Catarina Silva; Paula Sousa; Madalena Carvalho; Inês Aguiar-Ricardo; Pedro Alves da Silva; Nelson Cunha; Fausto J. Pinto; Ana Abreu
Abstract
<p style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Arial,sans-serif"><span style="color:#000000"><strong>Background:</strong></span></span></span><span style="font-size:11pt"><span style="font-family:Arial,sans-serif"><span style="color:#000000"> Cardiopulmonary exercise testing (CPET) provides multiple physiologic markers with established prognostic relevance. However, simple, practical CPET-based tools for risk stratification in patients entering cardiac rehabilitation (CR) are lacking.</span></span></span></p> <p style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Arial,sans-serif"><span style="color:#000000"><strong>Aim:</strong></span></span></span><span style="font-size:11pt"><span style="font-family:Arial,sans-serif"><span style="color:#000000"> To identify CPET parameters associated with all-cause mortality and develop a cumulative, clinically applicable CPET-based risk score.</span></span></span></p> <p style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Arial,sans-serif"><span style="color:#000000"><strong>Methods:</strong></span></span></span><span style="font-size:11pt"><span style="font-family:Arial,sans-serif"><span style="color:#000000"> We retrospectively analyzed patients enrolled in a CR program who underwent CPET prior to CR initiation. Clinical, laboratory, echocardiographic, and CPET data were collected from patients’ records. CPET variables associated with lower survival were identified using receiver operating characteristic (ROC) analyses to determine optimal thresholds. A cumulative score (0–5) was constructed by assigning one point per abnormal CPET parameter. Survival was assessed with Kaplan–Meier curves and multivariate Cox proportional hazards models.</span></span></span></p> <p style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Arial,sans-serif"><span style="color:#000000"><strong>Results:</strong></span></span></span><br /> <span style="font-size:11pt"><span style="font-family:Arial,sans-serif"><span style="color:#000000">Among 476 patients (mean age 61 years; 80% male; 84% ischemic heart disease), 67% had hypertension, 27% diabetes, 70% dyslipidemia, and 61% a history of smoking. Median serum creatinine and NT-proBNP were 0.93 mg/dL and 460 pg/mL, respectively; mean left ventricular ejection fraction was 50%.</span></span></span></p> <p style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Arial,sans-serif"><span style="color:#000000">Over a mean follow-up of 2.5 years, 20 deaths occurred. Five CPET parameters were associated with lower survival: peak VO2 <11.7 mL·kg?¹·min?¹, percent-predicted peak VO2 <57%, PETCO2 <31 mmHg, VE/VCO2 slope >32, and ventilatory power <5.7 (HR 2.5).</span></span></span></p> <p style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Arial,sans-serif"><span style="color:#000000">The cumulative CPET score demonstrated good discrimination for mortality (AUC 0.709); a score ≥3 identified patients with significantly reduced survival (log-rank p<0.001). In multivariate Cox regression, the score remained an independent predictor of all-cause mortality after adjusting for LVEF, age, NT-proBNP, eGFR, and cardiovascular risk factors (HR 1.551, 95% CI 1.160–2.075, p=0.003).</span></span></span></p> <p style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Arial,sans-serif"><span style="color:#000000"><strong>Conclusions:</strong></span></span></span><span style="font-size:11pt"><span style="font-family:Arial,sans-serif"><span style="color:#000000"> A simple additive score derived from five CPET parameters measured before CR initiation provides strong prognostic discrimination for all-cause mortality and may serve as a practical tool for risk stratification in cardiac rehabilitation candidates.</span></span></span></p>
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