To evaluate the prognostic significance of chronotropic incompetence (CI) during stress echocardiography (SE) in predicting mortality and cardiac events in patients with chronic coronary syndromes (CCS), emphasizing its clinical relevance.
Key Findings:
Mortality at 10 years was nearly two-fold higher in patients with CI (39% vs. 21%; P < 0.0001), indicating a critical need for monitoring CI in clinical settings.
Significant independent predictors of mortality included age, male sex, diabetes mellitus, left ventricular ejection fraction, resting heart rate, and CI, highlighting the multifactorial nature of risk assessment.
CI predicted all-cause mortality regardless of SE modality and in both normal sinus rhythm and atrial fibrillation, suggesting its broad applicability in patient evaluations.
Interpretation:
CI is a significant predictor of mortality in patients undergoing SE for CCS, highlighting its potential as a valuable prognostic marker that should be integrated into clinical assessments.
Limitations:
The definition of CI varied between SE modalities, which may introduce methodological inconsistencies that could affect the reliability of the findings.
The use of atropine during dobutamine SE was not detailed, potentially affecting heart rate responses and the interpretation of CI.
Conclusion:
CI serves as a critical marker for assessing risk in patients with CCS during SE, warranting further investigation into its role in autonomic function assessment and its integration into clinical practice.
Patients are mining Reddit and TikTok for symptom intel while you're not — and a small study calls it epistemic injustice. Different knowledge, mutually unrecognized. Maybe ask where they've been reading before you wave it off as anecdote.
