Exercise Stress Test-Induced Atrioventricular Dissociation With Syncope
Zin Thawdar Oo1,2, Dishang Bhavsar3,4,5, Thin Phyu Phyu Aung6
1University of Medicine 1, Yangon, Myanmar.
Insights
The exercise stress test, used for diagnosing coronary artery disease, can rarely cause atrioventricular dissociation. Prompt recognition and treatment of this complication are essential for patient recovery.
Area of Science:
- Cardiology
- Diagnostic Testing
Background:
- Exercise stress testing is a common diagnostic tool for coronary artery disease.
- While generally safe, potential complications like heart block, though rare, necessitate physician awareness.
Observation:
- A 65-year-old female experienced angina-like chest pain and underwent an exercise stress test.
- During the recovery phase, she developed atrioventricular dissociation with junctional rhythm and syncope.
Findings:
- The patient's condition resolved promptly with intravenous normal saline treatment.
- This case highlights a rare but unpredictable complication of exercise stress testing.
Implications:
- Clinicians must remain vigilant for rare adverse events during exercise stress tests.
- Timely intervention is crucial for managing complications such as atrioventricular dissociation and ensuring patient safety.
Abstract:
Background: The exercise stress test is widely used as a diagnostic test for evaluating coronary artery disease in symptomatic patients or those with underlying cardiovascular disorders. Although exercise stress test risk is minimal with a <1% chance of causing heart block, physician awareness of potential complications is paramount for prompt recognition and treatment. Case Report: A 65-year-old-female with angina-like chest pain underwent an exercise stress test for ischemic heart disease evaluation. She performed the exercise stress test up to stage 2 (exercise Bruce protocol) with an exercise duration of 5 minutes and maximum metabolic equivalents of 7. During her recovery phase, the patient developed atrioventricular dissociation with junctional rhythm followed by syncope. Immediate treatment was administered, including intravenous normal saline, and she recovered without any complications. Conclusion: This case reminds clinicians to be aware of the unpredictable effects of the exercise stress test even though atrioventricular dissociation after an exercise stress test is rare. Providing immediate treatment to prevent any untoward effects is essential.
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Exercise Stress Test
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
Dysrhythmias V: Evaluating Dysrhythmias
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