Incidence Of Arrhythmia In Group Research Articles

Analysis of the electrocardiograms of pathological changes in three main coronary arteries

Objective To evaluate the diagnostic value of the electrocardiogram in patients with pathological changes in three main coronary arteries this had been established by coronary angiography. Methods Retrospectively analyzed the electrocardiogram data from 113 patients with normal level of myocardial enzymes and pathological changes in three main coronary arteries which had been established by coronary angiography. The patients were divided into two groups: only coronary stricture was found (A); and coronary occlusion was found (B).Results The incidences of abnormal Q wave, abnormal ST segment, abnormal T wave, and in group B were higher than those in group A, and the incidence of arrhythmia in group A was higher than that in group B. No between-group difference was found in the incidence of abnormal ECG. Conclusions ECG can help diagnose patients with normal level of myocardial enzymes and pathological changes in 3 main coronary arteries but must with other methods. Key words: Electrocardiogram; Pathological changes in three main coronary arteries; Diagnosis

Different clinical features, biochemical profiles, echocardiographic and elctrocardiographic findings in older and younger patients with idiopathic dilated cardiomyopathy

Objective — To study the clinical features, biochemical profiles, echocardiographic and electrocardiographic findings in the elderly and younger with idiopathic dilated cardiomyopathy (IDCM). Methods — We measured biochemical profiles and reviewed the clinical features, echocardiographic and electrocardiographic findings in 40 elderly (group A) and 70 younger (group B) patients with IDCM.Results — The aldosterone level in group A was higher than in group B (304.8 ± 69.1 vs. 213.3 ± 54.5 pmol/l, P < 0.05).Triiodothyronine (T3) and free T3 in group A were lower than in group B (0.78 ± 0.21 and 2.87 ± 0.73 vs. 1.26 ± 0.33 nmol/l and 3.55 ± 0.64 pmol/l, all P < 0.05).The incidence of ventricular arrhythmia in group A was lower than in group B (61.3% vs. 92.1%, P < 0.01).The incidence of hypokalaemia and hypomagnesaemia were higher in group A (51.3% and 27.5%). 28.8% patients in group A were susceptible to digitalis intoxication. Disease duration and mean survival period in group A were longer than in group B (11.0 ± 4.7 and 6.9 ± 4.2 vs. 5.2 ± 2.5 y and 3.4 ± 2.7 y, all P < 0.05).The main cause of death in group A was congestive heart failure (78.9%) and ventricular arrhythmia (61.9%) in group B.Conclusions — The prognosis in group A was better than in group B.The patients in group A usually showed low T3 syndrome.Ventricular arrhythmia in group A may be due to heart failure, electrolyte imbalance and sympathetic activation.

A COMPARISON OF THE INCIDENCE OF CARDIAC ARRHYTHMIA DURING TWO METHODS OF ANAESTHESIA FOR DENTAL EXTRACTIONS

One hundred premedicated inpatients undergoing wisdom tooth extraction were divided into two groups of 50. Group A was anesthetized by a technique based on droperidol and phenoperidine, whilst group B was anaesthetized with halothane. The e.c.g. in both groups demonstrated a similar overall incidence of cardiac arrhythmia, but analysis revealed a significantly higher incidence of ventricular arrhythmia in group B. The heart rate was significantly less in group A.