Antiarrhythmic drug administration Hypoxia Ischaemia Atrial fibrillation Electrical shock administered during cardioversion Electrical shock caused by accidental contact with improperly grounded equipment Tachycardia Presented By Johnny J. What is Supraventricular Tachycardia? Supraventricular means “Coming from above the Antiarrhythmic drug administration Hypoxia Ischaemia Atrial fibrillation Electrical shock administered during cardioversion Electrical shock caused by accidental contact with improperly grounded equipment o.” Tachycardia means “Fast Heart Rate.” What is Supraventricular Tachycardia? Supraventricular Tachycardia (SVT) Paroxysmal Supraventricular Tachycardia (PSVT) Paroxysmal Atrial Tachycardia (PAT) Etiology [Cause] Most Supraventricular Tachycardia results from abnormal electrical connections in the heart that short-circuit the normal electrical system. What causes these abnormal pathways is not clear Etiology [Cause] During an episode of Supraventricular Tachycardia (SVT), the heartbeat is controlled by the SA node (not The normal timer of the heart). Another part of the heart overrides this timer with faster impulses. The source or ‘trigger’ of the impulse in an SVT is somewhere above the ventricles, but the impulse then spreads to the ventricles. The heart then contracts faster than normal. Etiology [Cause] Normally, the heart’s electrical system precisely controls the rhythm and rate at which the heart beats. In SVT, abnormal electrical connections cause the heart to beat too fast. speeds up to rates of about 150 to 200 beats per minute and occasionally as high as 300. After some time, the heart returns to a normal rate of 60 – 100 beats per minute on it’s own or after treatment. Symptoms: Symptoms last as long as the episode of SVT lasts. This may be seconds, minutes, hours, or rarely longer. Symptoms Include the following: •Your pulse rate becomes 150 – 200 beats per minute. •Palpitations (Feeling your heart beat) •Dizziness, or Feeling Light Headed •You may become breathless •If you have angina, then an angina pain may be triggered by an episode of SVT •You may have no symptoms, You may only be aware that your heart is beating fast. Treatment: Many episodes of Supraventricular Tachycardia (SVT) soon stop and no treatment Is needed. If an episode of SVT does last a long time or is severe you may be admitted to a hospital to stop it. Medicines which are given by injection into a vein will usually stop an SVT. [Adenosine is commonly used] Adenosine works by blocking Verapamil is an alternative if adenosine is the notheart. advised. electrical impulses of [People with asthma cannot have adenosine] Electric Shock treatment is rarely needed to stop an episode of SVT. Exams: Electrocardiogram [EKG] A test that measures the electrical signals that control the rhythm of your heartbeat. Exams: Electrocardiogram [EKG] The EKG between episodes of SVT is usually normal. So, doing an ECG between episodes of symptoms may not be much help. However, if SVT is suspected, you may be asked to wear a small portable ECG recorder. Some types record an ECG continuously over 24 hours. Others are designed so that you can switch it on to record when you have symptoms. This is called a Holter Monitor Exams: Electrocardiogram [EKG] An EKG of Supraventricular Tachycardia Other Exams: •Ambulatory Electrocardiogram records the electrical activity of your •Echocardiogram heart while you do your usual activities. is a diagnostic Manytest heart that problems uses •Stress Test become ultrasound noticeable waves to produce only during an is used to evaluate the heart and activity,ofsuch image the heart as exercise, muscleeating, and sex, •Cardiac Catheterization vascular system during exercise. It stress, the heart's bowel valves. movements, or even Ishelps a testanswer that measures to two general blood pressure sleeping. •Electrophysiological Study within questions: the heart 1) Is there and how occult much oxygen is a maps the used electrical isunderlying in test the that blood. heart It's disease also that to only get conduction systemthe inwhen the heart. information becomes apparent about pumping the ability of the heart heart is stressed muscle.by exercise? 2) If there is underlying heart disease, how severe is it? Once episodes of Supraventricular tachycardia begin, they generally occur again. These frequently stop spontaneously or with simple maneuvers but may require taking medications daily if they persist. Medication treatment typically includes beta-blockers, & calcium channel blockers. •Reduce Stress in your life. •Exercise regularly and maintain a healthy lifestyle. •Eliminate caffeine and other stimulants and alcohol. •Comply with medications and medical advice. •Learn more about this condition.