Tachycardia
Severity
HR
- Mild100–130 bpm
- Moderate130–150 bpm
- Emergency> 150 or unstable
🚨 Life-Threatening — exclude first
If suspected, escalate now.
Unstable broad-complex tachycardia (VT)
Septic shock
Massive PE
Significant haemorrhage
Severe electrolyte derangement
❤️
Cardiac Causes
Sinus tachycardiaAF / atrial flutterSVTVT / broad complexAcute MI
🫁
Respiratory Causes
PEHypoxia from any causePneumothorax
📉
Shock states Causes
SepsisHypovolaemia / haemorrhageCardiogenic shock
🧬
Endocrine / Metabolic Causes
Thyrotoxicosis / thyroid stormHypoglycaemiaDKAPhaeochromocytoma
🌡️
Pain / Anxiety / Pyrexia Causes
Uncontrolled painAnxiety / agitationFever
💊
Drugs / Toxins / Withdrawal Causes
Salbutamol, theophyllineCocaine, amphetaminesCaffeine, anticholinergicsAlcohol / opioid withdrawal