Blood pressure control in treated hypertensive patients in daily practice of Latvian family physicians.

BACKGROUND AND OBJECTIVE. The aim of this study was to evaluate blood pressure (BP) control level in treated hypertensive patients in Latvia and to compare their characteristics according to the adequacy of BP control. MATERIALS AND METHODS.

[Radiokinetocariography--a noninvasive introscopic method of studying the function of the right ventricle in patients with chronic bronchitis].

Registration of the reflected SHF electromagnetic waves directed to cardiac chambers served the basis for a new technique of cardiokinetoradiography (CKRG) described in the present paper. The technique promotes a phasic analysis of the right heart (RH) performance, evaluation of the RH anterior wall rate and an indirect estimation of the systolic pressure in the pulmonary artery. Prolonged relaxation including isometric relaxation, elevated Mancini isovolumic index are suggested to be early subclinical signs of the RH dysfunction in patients with chronic obstructive bronchitis.

[Radiokinetocardiography: our first experience in studying the movements of the anterior and lateral walls of the left ventricle in patients with myocardial infarct].

Radiokinetocardiography (RKCG), a noninvasive introscopic technique for studying the heart structures by detecting the echoes from the heart of the electromagnetic ultra-high-frequency signal, has been developed. RKCG was used to record the movements of the anterior and lateral walls of the left ventricle in 14 patients with large-focal myocardial infarction localized in the area indicated and in 30 normal persons. The patients were examined at weeks 4-5 of the disease.

[Results using a new method of rapid electrocardiographic diagnosis].

A simplified adjusted system of recordings from 4 electrocardiographic leads (ECG-4) and a standard analysis procedure, based on manual measurement of 18 criteria by a specially-trained operator (nurse), using a standard ruler, has been tried in order to make ECG screening more accessible and work out a uniform procedure of electrocardiographic screening. The assessment of the criteria used has demonstrated their high specificity (above 95%) in 145 normal subjects as well as good results of quick diagnosis. ECG-4, used in a population screening of 2458 people, detected ECG changes in 18.

Comparison of the informative value of electrocardiographic criteria of myocardial infarction with the use of different lead systems.

The authors compared the informative value of 39 criteria of myocardial infarction with ECG registration using the standard 12-lead system (ECG-12), 24 criteria according to Frank's orthogonal system (OECG-F), and 32 criteria according to the new 4-lead system (ECG-4). 127 patients with myocardial infarction (MI) were examined. The sensitivity of the most informative ECG-4 criteria of MI was higher (44.

[Comparative informative value of electrocardiographic criteria for hypertrophy of the left ventricle].

The author compared the informative value of 55 different electrocardiographic criteria of left ventricular hypertrophy (LVH) determined by ECG performed by the conventional 12-lead method, Frank's orthogonal method and by the simplified 4-lead electrocardiographic method, developed by the author, in 244 healthy subjects and in 134 hypertensive patients. The informative value of the LVH criteria according to the 4-lead ECG method is comparable to that of the conventional 12-lead ECG, while the predicative value of the LVH criteria by the 4-lead ECG is even slightly superior to the ECG recorded according to the orthogonal method.

Diagnosis of intraventricular conduction disturbances with the aid of orthogonal electrocardiography.

In 104 patients with various type of bundle branch block the three most known systems of orthogonal ECG leads (Frank; McFee-Parungao; Beswick-Jordan) were compared with 12 routine leads. All three orthogonal systems proved to possess good informative value, not inferior to that obtained by routine ECG. Examinations of 123 patients suffering from ischaemic heart disease with signs of diffuse myocardial changes with the aid of the Frank's system of orthogonal ECG confirmed the high informative value of the system in the detection of local disturbances of intraventricular conduction.

[Diagnosis of diffuse myocardial changes in ischemic heart disease using orthogonal ECG leads].

In 100 patients with chronic ischaemic heart disease and diffuse changes in the myocardium the data of 12 common ECG leads indicated that the corrected orthogonal leads according to Mac Fee--Parungao and Frank reflect these changes in all cases. The severity of the diffuse changes reflected in the deviations of the ST segment and the T-wave in the orthogonal leads corresponds to that reflected in the 12 common leads. A mathematical analysis of the waves of the QRS complex in the X, Y and Z leads indicates a growth of the left ventricular potentials with the development of diffuse myocardial changes.

Contribution to the vector analysis of the orthogonal electrocardiogram.

A method is described for characterizing the spatial directions of vectors with the aid of the angle alpha, characterizing the direction of the vector's projection upon the frontal plane, and angle beta, indicating the deflection of the spatial vector from the frontal plane. Angle alpha is expressed in the mode used with the conventional ECG system [from 0 degrees to +/- 180 degrees], and angle beta from 0 degrees to +/- 90 degrees. Calculations are made with the aid of algebraic formulae, and the results are tabulated.