What is bidirectional tachycardia?
Bidirectional ventricular tachycardia (BDVT) is a regular ventricular tachyarrhythmia (VT) with two different QRS morphologies alternating at a rate typically between 140 and 180 bpm.1 There are not many known related causes and the most common include digoxin toxicity, catecholaminergic polymorphic VT, myocarditis and …
What causes bidirectional ventricular tachycardia?
Bidirectional ventricular tachycardia (BDVT), a rare ventricular arrhythmia, is commonly caused by digitalis toxicity or channelopathies and is rarely caused by aconite toxicity, myocarditis, infarction, or sarcoidosis.
What is the pathophysiology of tachycardia?
In tachycardia, an irregular electrical signal (impulse) starting in the upper or lower chambers of the heart causes the heart to beat faster. Tachycardia (tak-ih-KAHR-dee-uh) is the medical term for a heart rate over 100 beats a minute. Many types of irregular heart rhythms (arrhythmias) can cause tachycardia.
What is ventricular flutter?
Ventricular flutter is an arrhythmia, more specifically a tachycardia affecting the ventricles with a rate over 250-350 beats/min, and one of the most indiscernible. It is characterized on the ECG by a sinusoidal waveform without clear definition of the QRS and T waves.
What is slow ventricular tachycardia?
Slow ventricular tachycardia (slow VT) is a ventricular tachycardia (VT), in which heart rate is below the typical frequency of VT. We here report a case of acute liver failure in a patient with slow VT.
When is tachycardia a problem?
Tachycardia refers to a heart rate that’s too fast. How that’s defined may depend on your age and physical condition. Generally speaking, for adults, a heart rate of more than 100 beats per minute (BPM) is considered too fast.
What causes ventricular flutter?
The immediate cause for most cases of ventricular fibrillation is ischemic heart disease, or coronary artery disease, with the ischemia altering electrical events to the point of causing complete lack of an organized rhythm.
Can a flutter be cured?
Typical atrial flutter is localized to the right atrium. This type of atrial flutter can be cured with a short outpatient catheter ablation procedure.
What is ventricular tachycardia?
Ventricular tachycardia is a heart rhythm disorder (arrhythmia) caused by abnormal electrical signals in the lower chambers of the heart (ventricles). This condition may also be called V-tach or VT.
How long does ventricular tachycardia last?
As a result, your heart may not be able to pump enough blood to your body and lungs. Ventricular tachycardia may last for only a few seconds, or it can last for much longer. You may feel dizzy or short of breath, or have chest pain.
What are the symptoms of ventricular tachycardia after 30 seconds?
When ventricular tachycardia lasts a short time, there may be no symptoms except palpitations — a fluttering in the chest. But ventricular tachycardia lasting more than 30 seconds may cause more severe symptoms: How is ventricular tachycardia treated?
What are the complications of ventricular tachycardia?
Complications of ventricular tachycardia vary in severity and depend on how fast your heart is beating, how long the rapid heartbeat lasts, how often tachycardia occurs and your overall heart health. Possible complications include: A dangerous condition related to ventricular tachycardia is ventricular fibrillation (V-fib).