Cough as a Feature of Pulmonary Edema and Pleural Effusion

Pulmonary Edema and Cough

The American College of Chest Physicians suggests that pulmonary edema typically presents with dyspnea and dry cough that progresses to productive cough with pink frothy sputum 1
The cough in pulmonary edema can be the sole presenting manifestation of congestive heart failure, according to the American Heart Association 2
Patients with heart failure experience worsening cough when lying down due to fluid redistribution that increases pulmonary congestion, as stated by the American Heart Association 2
The mechanism of pulmonary edema involves alveolar space and interstitial edema, with hyaline membrane formation in permeability edema, as described by the American College of Chest Physicians 1

The British Thoracic Society notes that patients with pleural effusion most commonly present with dyspnea, predominantly dry cough, and pleuritic chest pain, especially in children with parapneumonic effusion/empyema 3
Pleural effusion causes cough through mechanical irritation and compression of airways, as explained by the American College of Chest Physicians 4
The American Thoracic Society recommends that when thoracentesis removes large volumes rapidly, patients may develop severe cough, chest pain, or dyspnea, which are warning signs to stop fluid removal 5
Rheumatoid arthritis, SLE, and other connective tissue diseases cause pleural effusion that manifests with cough, according to the American College of Chest Physicians 6

Approximately 50% of patients with documented pulmonary embolism develop cough, which can occasionally be the presenting complaint, as stated by the American College of Chest Physicians 7
Small distal emboli create alveolar hemorrhage resulting in hemoptysis, pleuritis, and pleural effusion, as described by the American College of Chest Physicians 7

When evaluating cough with suspected cardiopulmonary pathology, look for orthopnea, progression from dry to productive cough with pink frothy sputum, bilateral crackles, and signs of volume overload in pulmonary edema, as recommended by the American Heart Association 2
Look for unilateral decreased chest expansion, dullness to percussion, reduced breath sounds, pleuritic chest pain, and patient lying on affected side in pleural effusion, as suggested by the British Thoracic Society 3

Do not assume cough in cardiac patients is always medication-related (ACE inhibitors); worsening heart failure with pulmonary edema is more common and potentially serious, as warned by the American Heart Association 2
In peritoneal dialysis patients, increased intraperitoneal pressures can cause GERD-related cough that mimics cardiac causes, as noted by the American College of Chest Physicians 8
When removing pleural fluid, limit to 1-1.5 L at one sitting unless monitoring pleural pressure; severe cough during thoracentesis indicates precipitous pressure drop and risk of re-expansion pulmonary edema, as recommended by the American Thoracic Society 5

Cough can be the sole presenting manifestation of congestive heart failure, and the classic "pink frothy sputum" represents advanced disease rather than early presentation, according to the American College of Chest Physicians 9, 10
Subclinical pulmonary edema can cause persistent dry cough without progression to frank alveolar edema, as noted by the American Thoracic Society 9, 10
Cardiac asthma, a manifestation of pulmonary venous hypertension, can present with wheezing and cough, mimicking bronchial asthma, as reported by the American Academy of Allergy, Asthma, and Immunology 11

Elevated B-natriuretic peptide levels support a cardiac etiology of dyspnea and cough, as recommended by the American Heart Association 11
Echocardiography is useful in assessing left ventricular function and filling pressures in patients with suspected pulmonary edema, according to the American Society of Echocardiography 11
Cardiopulmonary exercise testing may be necessary when the diagnosis remains unclear after initial evaluation, as suggested by the American Thoracic Society 11