II. Definitions
- Inappropriate Sinus Tachycardia
- Resting Heart Rate is consistently above physiologic range without physiologic or metabolic cause
- Exaggerated Heart Rate response to minimal exertion or body position change
III. Precautions
- Exclude the large number of Sinus Tachycardia causes before diagnosing Inappropriate Sinus Tachycardia
- Missed serious causes of Sinus Tachycardia may result in significant morbidity and mortality
IV. Risk Factors
- Teens or young adults
- Psychosomatic disorders
V. Symptoms
-
General
- Many of these cardiopulmonary symptoms are also see with serious causes (e.g. PE, ACS, Sepsis)
- Chest Pain
- Dyspnea
- Presyncope
- Anxiety
- Palpitations
VI. Signs
- Adults with Heart Rate consistently >100 beats per minute
VII. Differential Diagnosis
VIII. Management
- Exclude all other causes of Sinus Tachycardia
- Consider Autonomic Dysfunction (esp. POTS Syndrome)
- Activities that increase vagal tone (e.g. Yoga)
- Avoid stimulants and other triggers
- Consider symptomatic management with AV Nodal Blockers
- Beta Blockers (e.g. Propranolol, Metoprolol) for PVCs or PACs
- Non-Dihydropyridine Calcium Channel Blocker (e.g. Diltiazem, Verapamil) for PVCs
IX. References
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Related Studies
| Definition (NCI) | An electrocardiographic finding of supraventricular tachycardia involving the sinus node in which a patient has an atypically high heart rate which cannot be explained by factors such as fever, exercise, hypovolemia, etc. |
| Concepts | Disease or Syndrome (T047) |
| SnomedCT | 425582007 |
| English | Inappropriate sinus tachycardia, Inappropriate sinus tachycardia (disorder), Inappropriate Sinus Tachycardia by EKG Finding, Inappropriate Sinus Tachycardia, Inappropriate Sinus Tachycardia by ECG Finding |
| Spanish | taquicardia sinusal inadecuada, taquicardia sinusal inadecuada (trastorno) |
