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Exploring Peak Circulatory Power and Its Correlation with Exercise Test Parameters in Cardiac Rehabilitation
Session:
SESSÃO DE POSTERS 02 - RESULTADOS E AVALIAÇÃO DE PROGRAMAS DE REABILITAÇÃO CARDÍACA - DA PRÁTICA CLÍNICA AOS BENEFÍCIOS PARA O DOENTE
Speaker:
Ana L. Silva
Congress:
CPC 2025
Topic:
J. Preventive Cardiology
Theme:
29. Rehabilitation and Sports Cardiology
Subtheme:
29.2 Cardiovascular Rehabilitation
Session Type:
Cartazes
FP Number:
---
Authors:
Ana L. Silva; Bernardo Lisboa Resende; Rafaela Fernandes; Tatiana Pereira Dos Santos; Gonçalo Terleira Batista; Mariana Rodrigues Simões; Mafalda Griné; Ana Luísa Rocha; José Luís Martins; João Gameiro; Paulo Dinis; Lino Gonçalves
Abstract
<p style="text-align:justify"><strong>Background:</strong> Peak circulatory power (PCP), defined as the product between peak oxygen uptake and peak systolic blood pressure, has been proposed as a surrogate for cardiac power and a reliable prognostic marker in patients with heart failure and coronary artery disease. In cardiac rehabilitation (CR), where improving functional capacity is a key goal, understanding the relationship between PCP and other established Cardiopulmonary Exercise Test (CPET) parameters offers valuable insights for optimizing exercise prescriptions and monitoring progress.<br /> <strong>Purpose:</strong> To evaluate the relationship between baseline peak circulatory power (PCP) and key CPET parameters in patients undergoing CR.<br /> <strong>Methods:</strong> Single-center, retrospective observational study. Patients who performed a CPET before the phase II CR program between January 2023 and September 2024 were included. Data were collected by a specialized multidisciplinary team. Correlations between PCP and other CPET parameters were assessed using Pearson’s/Spearman’s correlation coefficient, as appropriate. Statistical analysis was performed using SPSS 28.0.1.1 software.<br /> <strong>Results:</strong> A total of 71 patients were included, with a mean age of 57.9±12.9 years and 51/71.8% male. The most common referral criterion to CR was coronary artery disease (49/60.9%), followed by heart failure (17/23.9%), with 21/29.6% presenting reduced left ventricular ejection fraction (LVEF) at baseline.<br /> In the pre-CR CPET, the mean peak VO2 was 19.5±6.2 mL/kg/min, the mean maximum systolic blood pressure was 165.3±30.4 mmHg, and the mean PCP was 3329.0± 1417.7mmHg·min/mL/kg. PCP significantly differed between patients with LVEF≤40% and those with LVEF>40% (2700.9±1267.7 vs. 3620.1±1402.6mmHg·min/mL/kg, respectively, p=0.016).<br /> Strong positive correlations were found between PCP and physical performance (watts) (r=0.823, p<0.001) and metabolic equivalents (METs) (r=0.890, p<0.001). Additionally, VO2 at the second anaerobic threshold demonstrated a very strong positive correlation with PCP (r=0.903, p<0.001). Moderate positive correlations were observed between PCP and maximum heart rate (HR) (r=0.533, p<0.001), VO2 at the first anaerobic threshold (r=0.624, p<0.001), and oxygen pulse (r=0.619, p<0.001). Conversely, low negative correlations were identified between PCP and respiratory reserve (r=-0.335, p=0.017) along with VE/VCO2 slope (r=-0.357, p=0.011).<br /> <strong>Conclusions:</strong> This study highlights the significant role of PCP in assessing exercise capacity and reinforces its potential utility in stratifying patients, tailoring exercise interventions, and monitoring progress during CR programs. PCP was notably lower in patients with reduced LVEF, emphasizing its sensitivity to cardiac dysfunction. Future studies should evaluate its prognostic implications and broader applicability in clinical practice.</p>
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