| Rate | 101-160/min |
| P wave | sinus |
| QRS | normal |
| conduction | normal |
| Rhythm | Regular or slightly irregular |
The clinical significance of this dysrhythmia depends on the underlying cause. Benign etiologies like stress and physical activity may not require cardiac intervention. However, underlying causes need to be thoroughly investigated to rule out serious systemic pathologies:
| Fear | Heart failure or heart attack. | Sepsis |
| Fever | Mitral valve prolapse | Shock |
| Intense exercise | Pulmonary embolism | Hyperthyroidism |
| Certain drugs | Hypoxia | Hypoglycemia |
| Dehydration | Anemia | Myocarditis |
Treatment includes identification and management of the underlying cause.
Instant Feedback:
Sinus tachycardia is a normal response to pain.
Reference
Henning A, Krawiec C. Sinus Tachycardia. [Updated 2023 Mar 5]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK553128/