Arrhythmias are one of the main risk factors for stroke. This is usually not a concern.īut sometimes sinus tachycardia signifies a health problem. This can be in response to a stressor like fever, fear, anxiety and strenuous exercise.
Sinus tachycardia is where the natural pacemaker in your heart sends electrical signals faster than normal. Treatments, such as drugs, medical procedures or surgery, may help control a rapid heartbeat or manage other conditions contributing to tachycardia. Sudden death, usually only associated with ventricular tachycardia or ventricular fibrillation.Frequent fainting spells or unconsciousness.Inability of the heart to pump enough blood (heart failure).Blood clots that can cause a stroke or heart attack.Complications of tachycardia vary in severity depending on factors such as the type of tachycardia, the rate and duration of rapid heart rate, and the existence of other heart conditions. In some cases, tachycardia may cause no symptoms or complications. In severe situations you can have a heart attack or become unconscious. palpitations, when you feel your heart pounding or beating irregularly.
It is possible to have tachycardia and have no symptoms. When anything disrupts this complex system, it can cause the heart to beat too fast (tachycardia), too slow (bradycardia) or with an irregular rhythm. When electrical impulses reach the muscles of the ventricles, they contract, causing them to pump blood either to the lungs or to the rest of the body. This slight delay allows the ventricles to fill with blood. The AV node slows down the electrical signal before sending it to the ventricles. The electrical impulses then arrive at a cluster of cells called the atrioventricular (AV) node - usually the only pathway for signals to travel from the atria to the ventricles. The sinus node produces electrical impulses that normally start each heartbeat.įrom the sinus node, electrical impulses travel across the atria, causing the atria muscles to contract and pump blood into the ventricles. The rhythm of your heart is normally controlled by a natural pacemaker called the sinus node, which is located in the right atrium. Your heart is made up of four chambers - two upper chambers (atria) and two lower chambers (ventricles). The heart’s electrical system controls the rate and rhythm of the heartbeat (see Figure 3). To understand the causes of tachycardia, it helps to understand how your heart’s internal electrical system works (see the Heart’s electrical system below). But in tachycardia, the heart beats faster than normal in the upper or lower chambers of the heart or both while at rest. It’s normal for your heart rate to rise during exercise or as a physiological response to stress, trauma or illness (sinus tachycardia). A healthy heart normally beats about 60 to 100 times a minute when at rest and is defined by signals that originate in the upper chambers of the heart (atria). What’s too fast for you may depend on your age and physical condition. Preventing episodes of a fast heart rateĪ heart rate of more than 100 beats per minute in adults is called tachycardia.Postural orthostatic tachycardia syndrome prognosis.Postural orthostatic tachycardia syndrome treatment.Postural orthostatic tachycardia syndrome signs and symptoms.Postural orthostatic tachycardia syndrome causes.Postural orthostatic tachycardia syndrome classifications.Postural orthostatic tachycardia syndrome diagnostic criteria.Postural orthostatic tachycardia syndrome.Ventricular tachycardia possible complications.Ventricular tachycardia outlook (prognosis).Risk factors for ventricular tachycardia.Supraventricular tachycardia prevention.Risk factors for supraventricular tachycardia.Who is likely to have supraventricular tachycardia?.Inappropriate sinus tachycardia treatment.
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