[Factors affecting onset of ventricular arrhythmias and sudden death in patients with dilated cardiomyopathy]. / K voprosu o faktorakh, vliiaiushchikh na vozniknovenie zheludochkovykh aritmii i vnezapnoi smerti u bol'nykh s diliatatsionnoi kardiomiopatiei.

The study of 46 patients suffering from dilated cardiomyopathy has shown that both ventricular tachycardias detected at 24-h ECG monitoring and late ventricular potentials are essential predictors of sudden arrhythmic death. These predictors depend neither on severity of left ventricular systolic and diastolic dysfunction nor on severity of cardiac decompensation.

[Electrocardiographic loading tests in persons with various ECG changes (findings of epidemiological studies)]. / Nagruzochnye élektrokardiograficheskie testy u lits s razlichnymi izmeneniiami EKG (po dannym épidemiologicheskogo issledovaniia).

The results from a complex of functional electrocardiographic tests (exercise test, transesophageal pacing of the left atrium, dipyridamole test and cold test) were compared with resting ECG data by using epidemiological findings from a study conducted in Novosibirsk. In the absence of other signs of the disease, coronary heart disease was verified in 11.1% of the persons with prominent Q-QS waves, in 10.0% of those with small Q-QS, in 16% of those with slightly altered ST segment and T wave, in 35.3% with marked altered ST-T interval, and in 50% of those with marked altered ST-T interval in the presence of left ventricular hypertrophy. The total number of cases with coronary heart disease amounted to 20.8% in the presence of ischemic ECG changes.

[Comparative assessment of stress electrocardiographic and echocardiographic tests in the diagnosis of insufficiency of the coronary circulation]. / Sravnitel'naia otsenka nagruzochnykh élektrokardiograficheskikh i ékhokardiograficheskikh prob v diagnostike nedostatochnosti koronarnogo krovoobrashcheniia.

Altogether 29 patients (14 with a characteristic clinical picture of CHD, 6 with probable angina and 9 with nonischemic cardialgia) were investigated by methods of two-dimensional echocardiography (echoCG) at rest and in combination with isometric exercise and left atrial transesophageal pacing test (LATPT) as well as by electrocardiographic exercise tests (bicycle ergometry testing and LATPT). EchCG exercise tests were conducted in most of the examinees (96.6%) whereas bicycle ergometry results were obtained in 75.9% of the patients (p less than 0.05). A significantly higher frequency of positive results of echoCG exercise tests in patients with typical CHD as compared to electrocardiographic exercise tests, and significantly high correlation of the results of the combination of echoCG with isometric exercise and echoCG with a degree of the pain syndrome in the heart area were revealed. The results obtained made it possible to recommend echoCG exercise tests for the diagnosis of coronary insufficiency.