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[Cardiac arrest in acute myocardial infarction during hospitalization]
Insights
Acute myocardial infarction (AMI) complicating cardiac arrest (CA) has high fatality rates. Primary ventricular fibrillation (VF) cases show better resuscitation success than secondary VF or ventricular standstill.
Area of Science:
- Cardiology
- Emergency Medicine
Background:
- Acute myocardial infarction (AMI) can complicate cardiac arrest (CA).
- Cardiac arrest incidence and fatality rates remain significant challenges in patient care.
Purpose of the Study:
- To analyze cardiac arrest cases complicating acute myocardial infarction.
- To evaluate the outcomes of different cardiac arrest rhythms and interventions.
Main Methods:
- Analysis of cardiac arrest cases admitted to a collaborative study group since 1972, with a focus on 1984-1985 data.
- Categorization of cardiac arrest into primary ventricular fibrillation (VF), secondary VF, and ventricular standstill.
- Review of resuscitation efforts, including temporary pacing for ventricular standstill.
Main Results:
- Cardiac arrest incidence ranged from 3.7-4.7%, with fatality rates between 72.4-83.3%.
- Primary VF had a 54.1% resuscitation rate, often occurring within 48 hours of admission.
- Secondary VF showed a lower resuscitation rate (16.7%), typically occurring after 48 hours.
- Ventricular standstill cases had varied outcomes, with temporary pacing aiding recovery in some instances.
Conclusions:
- Cardiac arrest complicating AMI presents a critical clinical scenario with high mortality.
- Primary VF is more amenable to resuscitation than secondary VF or ventricular standstill.
- The timing of cardiac arrest relative to admission impacts outcomes, highlighting the importance of continuous monitoring.
Abstract:
Cases of acute myocardial infarction (AMI) complicating cardiac arrest (CA) admitted to collaborative study group since 1972 were presented, and CA cases of 1984-1985 were analyzed. The incidence of CA were 3.7-4.7%, and fatality were 72.4-83.3% in recent years. In 118 cases of CA. 37 were primary ventricular fibrillation (VF), 33 of them occurred within 48 hours after admission, 54.1% were resuscitated. 30 were secondary VF, 27 occurred 48 hours after admission, 16.7% were resuscitated. 24 cases were ventricular standstill, 12 occurred following sinus bradycardia, sinoatrial block or atrioventricular block, 5 recovered by temporary pacing. 27 cases were undetermined because of no electrocardiographic monitoring available during onset of CA.