Cough as a symptom of heart failure
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Cough as a Symptom of Heart Failure: Clinical Relevance and Patterns
Prevalence and Classification of Cough in Heart Failure
Cough is recognized as a less typical but still significant symptom in patients with heart failure (HF). While classic symptoms of HF include breathlessness and swelling, studies show that cough is reported in nearly half of HF patients, making it an important clinical feature to consider, especially in community settings and among older adults Seckin2023Seckin2023. Cough can sometimes be the first or only presenting symptom, particularly in subtle or early cases of chronic heart failure, as highlighted in case reports and systematic reviews Sroczyńska2025Seckin2023Seckin2023.
Pathophysiological Mechanisms Linking Cough and Heart Failure
The relationship between cough and heart failure is complex and can be explained by both reflex and hemodynamic mechanisms. Fluid accumulation in the lungs due to heart dysfunction can irritate airway receptors, leading to cough. Additionally, abnormal heart rhythms (arrhythmias) can trigger cough through reflex pathways, and successful treatment of the underlying arrhythmia often resolves the cough Grabczak2020Pavlicek-Bahlo2021Sakihara2019. This bidirectional relationship means that cough can be both a cause and a consequence of heart dysfunction Grabczak2020Pavlicek-Bahlo2021.
Diagnostic Considerations: Differentiating Cardiac from Non-Cardiac Cough
Cough is often initially attributed to respiratory causes, but its presence in heart failure requires careful evaluation. Echocardiography and chest X-ray imaging are valuable tools in distinguishing cardiac-induced cough from other etiologies, especially in primary care settings Sroczyńska2025Pavlicek-Bahlo2021. It is also important to differentiate cough caused by heart failure from that due to medications (such as ACE inhibitors) or respiratory infections like COVID-19 .
Symptom Clusters and Prognostic Implications
Research has identified distinct symptom clusters in heart failure, with cough frequently co-occurring with other symptoms such as edema and dyspnea. Patients with multiple symptoms, including cough, are at higher risk for in-hospital death, rehospitalization, and all-cause mortality. Monitoring and managing these symptom clusters can help reduce adverse outcomes and improve patient care .
Technology and Early Detection
Advances in technology, such as smartphone-based systems, are being developed to detect cough episodes as early indicators of heart failure exacerbation. These tools can help patients and clinicians monitor symptoms more effectively and may reduce hospital readmissions by enabling earlier intervention Windmon2020Windmon2019.
Conclusion
Cough is a notable, though less typical, symptom of heart failure that can sometimes be the first or only sign of the condition. Its presence should prompt clinicians to consider heart failure in the differential diagnosis, especially in older adults or those with risk factors. Understanding the mechanisms, diagnostic approaches, and prognostic significance of cough in heart failure can lead to better patient outcomes and more comprehensive care Sroczyńska2025Grabczak2020Pavlicek-Bahlo2021+6 MORE.
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