AMBULATORY 24-HOUR ECG MONITORING IN PATIENTS WITH DIZZINESS.
Background: One of the most common and dangerous causes of episodic dizziness and loss of consciousness are heart rhythm and conduction disturbances. The aim of our study was to determine the incidence of various arrhythmias in patients with dizziness.
Material and methods: We examined 68 patients, 28 men and 40 women with complaints on dizziness or those who had an episode of loss of consciousness. The average age of patients was 55.7 years. All patients were performed 24-hour Holter ECG monitoring in modified leads CS-1, CM-5, Y.
Results: Episodes of atrial fibrillation / flutter were recorded in 10 patients (14.7%) with mean age 66.8 years. Paroxysms of supraventricular tachycardias were found in 22 subjects (32.6%), mean age - 55.7 years. High grade of ventricular extrasystoles (Lown IV-V) was observed in 8 patients (11.7%), mean age 53.2 years. Atrioventricular block II Mobitz II and complete AV block were found in 9 patients (13.2%) mean age 60.4 years. Sick sinus syndrome was recorded in 8 subjects (11.7%), mean age – 69.6 years. In 11 patients (16.1%), despite the presence of complaints about dizziness during Holter monitoring, were not detected serious arrhythmias and conduction disturbances. The average age of patients in this group - 34.6 years.
Conclusions: High grade ventricular extrasystoles, advanced cases of AV block and sick sinus syndrome can be attributed to dangerous arrhythmias and occur in 36.8% of patients with dizziness mostly of older age. Dizziness in younger patients can not often be associated with rhythm and conduction disorders. 24-hour Holter ECG monitoring is an effective method of diagnosis in patients complaining on dizziness or those having episodes of loss of consciousness.