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Electrocardiographic abnormalities after nontraumatic subarachnoid hemorrhage
G Lanzino1, G L Kongable, N F Kassell
1Department of Neurological Surgery, University of Virginia Health Sciences Center, Charlottesville 22908.
Journal of Neurosurgical Anesthesiology
|July 1, 1994
Summary
Spontaneous subarachnoid hemorrhage (SAH) can cause cardiac arrhythmias, including life-threatening ones. Continuous cardiac monitoring is crucial for patients with SAH due to potential ECG abnormalities and ventricular arrhythmias.
Area of Science:
- Cardiology
- Neurology
- Critical Care Medicine
Background:
- Electrocardiographic (ECG) abnormalities and rhythm disorders are common after spontaneous subarachnoid hemorrhage (SAH).
- These can range from benign to life-threatening arrhythmias like ventricular fibrillation and torsade de pointe.
- Prolonged Q-T interval, particularly with hypokalemia, is a key indicator for severe ventricular arrhythmias.
Purpose of the Study:
- To investigate the occurrence and significance of ECG abnormalities following SAH.
- To explore the association between ECG changes, cardiac damage markers, and life-threatening arrhythmias.
- To understand the underlying pathophysiology, including autonomic imbalance and catecholamine influence.
Main Methods:
- Continuous cardiac monitoring of patients post-SAH.
- ECG analysis for abnormalities, including Q-T interval prolongation.
- Assessment of cardiac biomarkers like creatine phosphokinase-myocardial fraction.
- Pathological examination of cardiac tissue in deceased patients.
Main Results:
- SAH frequently causes ECG abnormalities, some mimicking myocardial infarction.
- Elevated creatine phosphokinase-myocardial fraction suggests cardiac damage.
- Pathological findings include myocytolysis and intramyocardial hemorrhages.
- A significant association exists between Q-T prolongation and life-threatening ventricular arrhythmias.
Conclusions:
- Continuous cardiac monitoring is essential for SAH patients.
- ECG abnormalities, especially Q-T prolongation, predict severe cardiac events.
- Autonomic dysfunction and catecholamine surges play a role in SAH-induced cardiac complications.