Heart failure and chronic obstructive pulmonary disease: a review

Heart failure (HF) and chronic obstructive pulmonary disease (COPD) are important causes of morbidity and mortality worldwide. The association between the two conditions have significant systemic effects and a chronic, progressive evolution, affecting exercise tolerance and quality of life. The diseases share common risk factors, such as smoking, advanced age, and low-grade systemic inflammation. The majority of symptoms and physical signs, such as dyspnoea, orthopnea, nocturnal cough, exercise intolerance, muscle weakness may coexist in both pathologies. Thus, the differential clinical diagnosis between exacerbation of COPD and HF decompensation may be difficult. Natriuretic peptides are sensitive biomarkers of HF, used mostly to exclude HF if their values are less than 100 pg/mL for Brain Natriuretic Peptide (BNP), respectively less than 300 pg/mL for N-terminal-pro Brain Natriuretic Peptide (NT-proBNP). Natriuretic peptides are very useful in emergency, for the differential diagnosis of acute dyspnoea. Echocardiography is the standard imaging technique of HF diagnosis and should be performed in all patients with potential HF. Treatment of patients with both HF and COPD should include drugs that prolong survival in HF, such as angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, cardioselective beta1-blockers, aldosterone antagonists, and long-acting bronchodilators (an antimuscarinic rather than a beta2-agonist). The prognosis of patients with both diseases is worse than in patients with only one of the two conditions. These patients represent a continuous challenge of diagnosis and treatment for the clinicians and require a close monitoring of cardiopulmonary function.