From the Research
Causes of Tachycardia
- Tachycardia can be caused by various cardiac disorders, such as cardiomyopathy, valvular heart disease, and coronary artery disease, as well as primary cardiac arrhythmias 1
- Noncardiac disorders can also cause palpitations, which may be an effect of the disease on cardiac rhythm 1
- Mechanical stimuli, such as those caused by a giant pseudoaneurysm of the ascending aorta, can lead to ventricular tachycardia 2
- Atrial tachycardia can arise from the aorta, specifically from the non-coronary cusp, and can be ablated safely and successfully from this site 3
Relationship between Heart Rate and Aortic Regurgitation
- Heart rate can influence the Doppler aortic regurgitant velocity curve, with tachycardia having a greater effect than bradycardia 4
- Heart rate correction of pressure half-time (PHT) can be clinically useful in patients with higher heart rates (≥ 85 beats/min) to confirm aortic regurgitation severity 4
Tachycardia after Aortic Valve Replacement
- Alternating wide complex tachycardia can occur after surgical aortic valve replacement, and can be caused by typical bundle branch reentry ventricular tachycardia (BBRVT) 5
- Electrophysiology study (EPS) can demonstrate the key diagnostic features of BBRVT, and right bundle ablation can be an effective treatment 5