Tachycardia resident survival guide
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: M.Umer Tariq [2]; Priyamvada Singh, M.D. [3]
Overview
Overview
Tachycardia is a form of cardiac arrhythmia which refers to a rapid beating of the heart. By convention the term refers to heart rates greater than 100 beats per minute in the adult patient. Heart rate typically greater than 150 beats per minute in tachyarrhythmia.[1]
Classification
Algorithm based on the 2003 ACLS guidelines for the management of tachycardia.[2]
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: M.Umer Tariq [2]
Overview
Tachycardias can be classified in a variety of ways. One form of classification is whether it is a wide-complex tachycardia, or whether it is a narrow-complex tachycardia. Another way of classifying tachycardia is whether the rhythm is regular or whether it is irregular. Tachycardia can also be distinguished by type; whether is is a sinus tachycardia, a ventricular tachycardia, a supraventricular tachycardia, or atrial fibrillation.
Classification
Origin of the Pacemaker
Atrial Rhythms
- Atrial fibrillation (Afib)
- Atrial flutter
- Multifocal atrial tachycardia
- Premature atrial contractions (PACs)
- Sick sinus syndrome
- Sinus tachycardia
- Supraventricular tachycardia (SVT)
- Wandering atrial pacemaker
Atrial Ventricular Arrhythmias
Junctional Arrhythmias
- Junctional rhythm
- Junctional tachycardia
- Premature junctional complex
Ventricular Rhythms
- Accelerated idioventricular rhythm
- Premature ventricular contractions (PVC)
- Ventricular tachycardia
- Ventricular fibrillation
QRS Morphology
It is sometimes useful to classify tachycardias as either narrow complex tachycardias (often referred to as supraventricular tachycardias) or wide complex tachycardias. Narrow and wide refer to the width of the QRS complex on the ECG. Narrow complex tachycardias tend to originate in the atria, while wide complex tachycardias tend to originate in the ventricles.
Rhythm Regularity
Tachycardias can be further classified as either regular or irregular.
References
Causes
Causes
Acute treatable causes of tachycardia
H’s
- Hypoxia
- Hypovolemia
- Hydrogen ion (acidosis)
- Hypo-/hyperkalemia
- Hypothermia
T’s
- Toxins
- Tamponade (cardiac)
- Tension pneumothorax
- Thrombosis, pulmonary
- Thrombosis, coronary[3]
FIRE: Focused Initial Rapid Evaluation
FIRE: Focused Initial Rapid Evaluation
A Focused Initial Rapid Evaluation (FIRE) should be performed to identify patients in need of immediate intervention.
| Tachycardia | |||||||||||||||||||||||||||||||||||||||
| Pulse | No Pulse | ||||||||||||||||||||||||||||||||||||||
| Evaluate and treat instability: | Pulseless VT or PEA | ||||||||||||||||||||||||||||||||||||||
❑ 12-lead ECG, don’t delay therapy
❑ Ischemic chest discomfort | Proceed to ACLS Cardiac Arrest Algorithm | ||||||||||||||||||||||||||||||||||||||
| Hemodynamic stable | Hemodynamic unstable | ||||||||||||||||||||||||||||||||||||||
| Check QRS-duration | Synchronized cardioversion: ❑ Consider sedation | ||||||||||||||||||||||||||||||||||||||
❑ Doses/details of synchronized cardioversion:
❑ Adenosine IV dose:
| |||||||||||||||||||||||||||||||||||||||
| Wide complex tachycardia (≥120 ms) | Narrow complex tachycardia (<120 ms) | Proceed to Hemodynamic instability resident survival guide | |||||||||||||||||||||||||||||||||||||
| Consider expert consultation Consider antiarrhythmic infusion Consider adenosine only if monomorphic and regular | Vagal maneuvers (No carotic sinus massage in patients with recent transient ischemic attack/stroke/ipsilateral significant carotid artery stenosis/carotid artery bruit)[4] Beta-Blockers or calcium channel blocker Consider expert consultation Adenosine if regular | ||||||||||||||||||||||||||||||||||||||
| Proceed to Narrow complex tachycardia resident survival guide | |||||||||||||||||||||||||||||||||||||||
❑ Antiarrhythmic infusion for stable wide-QRS tachycardia:
| |||||||||||||||||||||||||||||||||||||||
| Proceed to Wide complex tachycardia resident survival guide | |||||||||||||||||||||||||||||||||||||||
Algorithm based on the 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care.[3]
References
References
- ↑ Neumar, Robert W.; Otto, Charles W.; Link, Mark S.; Kronick, Steven L.; Shuster, Michael; Callaway, Clifton W.; Kudenchuk, Peter J.; Ornato, Joseph P.; McNally, Bryan; Silvers, Scott M.; Passman, Rod S.; White, Roger D.; Hess, Erik P.; Tang, Wanchun; Davis, Daniel; Sinz, Elizabeth; Morrison, Laurie J. (2010-11-02). “Part 8: adult advanced cardiovascular life support: 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care”. Circulation. 122 (18 Suppl 3): –729-767. doi:10.1161/CIRCULATIONAHA.110.970988. ISSN 1524-4539. PMID 20956224.
- ↑ Blomström-Lundqvist C, Scheinman MM, Aliot EM, Alpert JS, Calkins H, Camm AJ; et al. (2003). “ACC/AHA/ESC guidelines for the management of patients with supraventricular arrhythmias–executive summary. a report of the American college of cardiology/American heart association task force on practice guidelines and the European society of cardiology committee for practice guidelines (writing committee to develop guidelines for the management of patients with supraventricular arrhythmias) developed in collaboration with NASPE-Heart Rhythm Society”. J Am Coll Cardiol. 42 (8): 1493–531. PMID 14563598.
- ↑ 3.0 3.1 Neumar RW, Otto CW, Link MS, Kronick SL, Shuster M, Callaway CW; et al. (2010). “Part 8: adult advanced cardiovascular life support: 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care”. Circulation. 122 (18 Suppl 3): S729–67. doi:10.1161/CIRCULATIONAHA.110.970988. PMID 20956224.
- ↑ Strickberger SA, Benson DW, Biaggioni I, Callans DJ, Cohen MI, Ellenbogen KA; et al. (2006). “AHA/ACCF Scientific Statement on the evaluation of syncope: from the American Heart Association Councils on Clinical Cardiology, Cardiovascular Nursing, Cardiovascular Disease in the Young, and Stroke, and the Quality of Care and Outcomes Research Interdisciplinary Working Group; and the American College of Cardiology Foundation: in collaboration with the Heart Rhythm Society: endorsed by the American Autonomic Society”. Circulation. 113 (2): 316–27. doi:10.1161/CIRCULATIONAHA.105.170274. PMID 16418451.
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