- Sudden cardiac arrest/acute coronary syndrome
- Exertional heat stroke
- Cardiac conditions
- Hypertrophic cardiomyopathy
- Coronary artery anomalies
- Arrhythmogenic right ventricular cardiomyopathy
- Long QT syndrome
- Direct blow to the head or chest (commotio cordis) with loss of consciousness
- Status asthmaticus
- Anaphylaxis
| - Exercise associated postural hypotension
- Exhaustion
- Mild to moderate dehydration
- Cramping
- Mild hypoglycemia
|