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Pericardial tamponade-associated hyponatremia.
Meir Mouallem1, Ido Wolf, Gregory Mindlin
1Department of Internal Medicine E, Sheba Medical Center, Tel Hashomer, Israel. mouallem@post.tau.ac.il
The American Journal of the Medical Sciences
|January 25, 2003
Summary
Severe weariness in a lung cancer patient was caused by hyponatremia due to malignant pericardial effusion. Correcting the effusion rapidly resolved the low sodium levels, highlighting a critical link between cardiac tamponade and electrolyte imbalance.
Area of Science:
- Oncology
- Nephrology
- Cardiology
Background:
- Lung adenocarcinoma can present with complex paraneoplastic syndromes.
- Hyponatremia is a common electrolyte disturbance with diverse etiologies.
- Malignant pericardial effusion can lead to cardiac tamponade, impacting hemodynamic stability.
Observation:
- A 58-year-old patient with lung adenocarcinoma experienced severe fatigue attributed to hyponatremia.
- The underlying cause of hyponatremia was identified as a malignant pericardial effusion causing cardiac tamponade.
- The patient's hyponatremia resolved promptly following surgical evacuation of the pericardial effusion.
Findings:
- Malignant pericardial effusion can precipitate severe hyponatremia through mechanisms potentially involving altered renal water excretion or fluid shifts.
- Cardiac tamponade secondary to malignant effusion is a critical factor in the development of this electrolyte abnormality.
- Rapid correction of hyponatremia is achievable by addressing the primary cause, the pericardial effusion.
Implications:
- This case underscores the importance of investigating cardiac causes, such as malignant pericardial effusion, in patients with unexplained hyponatremia and cancer.
- Early recognition and management of pericardial effusion in lung cancer patients can prevent severe complications like symptomatic hyponatremia and tamponade.
- Understanding the pathogenetic link between pericardial effusion and hyponatremia may guide therapeutic strategies and improve patient outcomes.