Sinus tachycardia (ST) – increased heart rate at rest up to 90-130 per minute. With heavy physical exertion, the normal regular sinus rhythm increases to 150-160 per minute (in athletes – up to 200-220). Etiology – generation of excitatory impulses by the sinoatrial node with an increased frequency
- Fever (an increase in body temperature by 1 ° C causes an increase in heart rate by 10 per minute)
- Excitation (hypercatecholaminemia)
- Physical exercises
- Left ventricular failure
- Cardiac tamponade
- drugs (adrenaline, ephedrine, atropine). Diseases most commonly associated with TS
- mitral stenosis
- Aortic valve insufficiency
- Pulmonary tuberculosis.
- Palpitations, feeling of heaviness, sometimes pain in the region of the heart
- Symptoms of the underlying disease.
- Heart rate at rest – 90-130 per minute
- Each P wave corresponds to the QRS complex, the P-P intervals are equal to each other, but when combined with sinus arrhythmia, they can differ by more than 0.16 s
- With severe ST, the P waves may merge with the T waves preceding them, simulating atrial or atrioventricular paroxysmal tachycardia. Differential sign: vagal reflexes (massage of the carotid sinus, Valsalva maneuver) slow the rhythm for a short time, helping to recognize the P waves.
- Supraventricular paroxysmal tachycardia
- Atrial flutter with regular conduction to the ventricles 2:1.
- Elimination of the identified risk factor: exclusion of smoking, drinking alcohol, strong tea, coffee, spicy food, sympathomimetic drugs (including drops
into the nose)
- Treatment of the underlying disease
- B-blockers in small doses orally (prescribed infrequently)
- Sedative products
- With concomitant heart failure – cardiac glycosides, pathogenetic therapy.
Reduction. ST – sinus tachycardia ICD. 149 Other cardiac arrhythmias