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The Daily Insight

What is the difference between sinus tachycardia and ventricular tachycardia?

Author

Mia Phillips

Updated on February 28, 2026

Ventricular tachycardia starts in the heart’s lower chambers (ventricles) and can be life threatening. Sinus tachycardia is a fast but steady increase in heart rate where the sinoatrial node (the heart’s natural pacemaker) sends electrical signals at a quicker rate.

What causes sinus ventricular tachycardia?

It occurs when faulty electrical connections in the heart set off a series of early beats in the upper chambers of the heart (atria). SVT starts above the heart’s ventricles (supraventricular) in the two upper chambers or a cluster of cells called the atrioventricular (AV) node.

How do you fix ventricular tachycardia?

Sustained ventricular tachycardia often requires urgent medical treatment, as this condition may sometimes lead to sudden cardiac death. Treatment involves restoring a normal heart rate by delivering a jolt of electricity to the heart. This may be done using a defibrillator or with a treatment called cardioversion.

How serious is ventricular tachycardia?

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. Sometimes, ventricular tachycardia can cause your heart to stop (sudden cardiac arrest), which is a life-threatening medical emergency.

What is the best treatment for sinus tachycardia?

The treatment depends on the cause of the arrhythmia. In some people, massaging the carotid sinus in the neck will stop the problem. Other people require medications such as digitalis (Lanoxin), beta-blockers, calcium channel blockers, or amiodarone (Cordarone, Pacerone, generic versions).

What medications cause sinus tachycardia?

Other things that can cause sinus tachycardia include: anxiety or emotional distress fever some medications stimulants, such as caffeine or nicotine recreational drugs, such as cocaine

What are the symptoms of sinus tachycardia?

A racing heart rate or palpitations

  • The feeling of the heart pounding in the chest.
  • Dizziness (in some cases)
  • Actual syncope (fainting)
  • Consistent fast heart rate (above 100 BPM) even at rest; although some nights it seems to slow down to around 80 BPM
  • Periodic chest pain,sometimes sharp,other times constraining,accompanied with chest pressure
  • What is a sinus rhythm in ECG?

    A sinus rhythm is any cardiac rhythm where depolarization of the cardiac muscle begins at the sinus node. It is characterised by the presence of correctly oriented P waves on the electrocardiogram (ECG).