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ARRHYTHMIAS CAUSED BY DISTURBANCE OF FUNCTION OF SINUS NODE AUTOMATISM

Прочитайте:
  1. Acute disturbances of cardiovascular system
  2. Cardiac arrhythmias
  3. DISTURBANCE OF CONDUCTION FUNCTION
  4. External nose. Nasal cavity (olfactory and respiratory regions). Paranasal sinuses.
  5. Fig. 31. b) sinus bradycardia.
  6. Function display(p)
  7. FUNCTION OF THE LIVER
  8. Functional anatomy of organ of sense. Understanding of about analysers: their components, classification.
  9. Hindbrain. Pons: external and internal structure. Cerebellum: external and internal structure, nucleuses of cerebellum, their function. The cavity of the hindbrain.

Sinus tachycardia (Fig. 31 a) is characterized by the heart rate of 100-140 per minute with a regular rhythm at rest.

An acceleration of regular sinus rhythm is noted on the ECG, PQ may be diminished.

Causes:

— noncardiac — emotional agitations, fever, bleeding, intoxication, adrenalin release in pheochromocytoma;

— cardiac — endo-, peri- and myocardites, myocardial infarction.
Treatment: elimination of causes; medicamentous therapy — /3-adreno-

blockers anaprilinum (propranolol) 0.03-0.1 mg/kg, esmolol 0.5 mg/kg, trasicor, obsidan, inderal 0.08-0.15 mg/kg at the rate of 1 mg/min.; calcium antagonists — verapimil (isoptin) 0.075-0.15 mg/kg.

Sinus bradycardia (Fig. 31 b) is characterized by slowing down of
heart rate less than 60 per min., with regular rhythm.

On ECG there is normal and stable sequence of R-R interval with infrequent rhythm.


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