Acute myocardial infarction and heart block: a challenge to emergency physicians
Marcelo Rodrigues Bacci1, Janaina Aparecida Boide Santos, Leonardo Fernando Ferrari Nogueira
1Department of General Practice, Faculdade de Medicina do ABC, Santo André, Brazil. mrbacci@yahoo.com
Insights
This case highlights a rare complication of thrombolytic therapy during acute ST-elevation myocardial infarction, where temporary total heart block occurred. Prompt emergency physician decisions are crucial for managing such critical cardiac events.
Area of Science:
- Cardiology
- Emergency Medicine
- Clinical Case Reports
Background:
- Acute ST-elevation myocardial infarction (STEMI) requires timely reperfusion therapy.
- Thrombolytic therapy is a common treatment for STEMI, aiming to restore blood flow.
- Heart block is a potential complication, particularly in inferior wall myocardial infarction.
Observation:
- A patient presenting with inferior wall STEMI experienced transitory total heart block within hours of symptom onset.
- Hemodynamic stability was maintained prior to thrombolytic therapy administered 8 hours post-pain onset.
- No recurrence of heart block was observed after the initial event.
Findings:
- The case illustrates a potential complication associated with thrombolytic therapy in STEMI.
- The occurrence of heart block was transient and resolved without intervention.
- Successful thrombolytic therapy often correlates with the reversion of associated arrhythmias.
Implications:
- This case underscores the importance of rapid clinical assessment and decision-making by emergency physicians during STEMI treatment.
- Consideration for pacemaker implantation is advised if hemodynamic compromise develops post-thrombolysis.
- Recognizing and managing transient heart block is vital for optimizing patient outcomes in STEMI.
Abstract:
We present the case of a patient who underwent an acute ST-elevation myocardial infarction of the inferior wall and transitory total heart block in the first hours of his clinical presentation. There was no haemodynamic instability before the thrombolytic therapy was performed 8 h after the onset of pain. There was no block recurrence. The current case shows a possible complication during the thrombolytic therapy and the urge for a quick decision by the emergency physician. Pacemaker implantation should be considered in the event of the patient's haemodynamic worsening once the success of the therapy is a reflex of the arrhythmia reversion most of the times.
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