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Cor pulmonale is a condition where the right side of the heart becomes enlarged and weakened due to chronic lung disease or pulmonary hypertension. It is caused by increased blood pressure in the pulmonary arteries, which forces the right ventricle to work harder to pump blood through the lungs. The B-Type Natriuretic Peptide (BNP) test is the most important test for detecting heart strain associated with cor pulmonale.
Cor pulmonale is caused by chronic lung diseases and conditions that increase blood pressure in the pulmonary arteries (pulmonary hypertension). The most common causes include chronic obstructive pulmonary disease (COPD), emphysema, chronic bronchitis, pulmonary embolism, cystic fibrosis, and obstructive sleep apnea. These conditions force the right side of your heart to work much harder to pump blood through narrowed or damaged lung blood vessels, eventually causing the right ventricle to enlarge and weaken over time.
The B-Type Natriuretic Peptide (BNP) test is the most important blood test for cor pulmonale because it measures a hormone released by your heart when it is under stress or strain. When the right side of your heart struggles to pump blood through high-pressure pulmonary arteries, BNP levels rise significantly in your bloodstream. While imaging tests like echocardiograms are essential for confirming the diagnosis, BNP testing provides crucial information about the severity of heart strain and helps your doctor monitor how your condition is progressing and responding to treatment.
You should get tested if you have a chronic lung condition and develop symptoms like unexplained shortness of breath, fatigue, swelling in your ankles or legs, chest discomfort, or a persistent cough. Testing is especially important if you have COPD, emphysema, sleep apnea, or other lung diseases and notice your symptoms worsening despite treatment. If you experience rapid heartbeat, fainting spells, or bluish discoloration of your lips or skin, seek immediate medical evaluation as these may indicate advancing heart strain requiring urgent attention.
What this means
Your BNP level is slightly elevated above the normal range, which may indicate your heart is experiencing some strain or working harder than ideal. While this is not necessarily heart failure, it suggests your heart function should be monitored more closely, especially if you're experiencing symptoms like shortness of breath or fatigue.
Recommended actions
Reduce sodium intake to less than 2,000mg daily to decrease fluid retention
Monitor your weight daily and report sudden gains to your doctor
Incorporate gentle cardiovascular exercise like walking as tolerated
Follow up with a cardiologist for further cardiac evaluation and discuss treatment options
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