- See QT widening 
- Sinus Tach: HR >100 BPM and < 150 BPM; 
- PSVT 
- V. Tach;  
- PAT 
- Junctional Tachycardia 
- V. Tach 
- Hypovolemia 
- hypotension 
- Anaphylaxis 
- Sepsis: 
- Hyperthyroidism 
- Hypoxia 
- Acute MI/Angina/Chest Pain 
- ? Atrial Fibrillation/flutter