PubMed Health⌕ Search

Biomedical subjects

G Joskowicz

Publications and source records attributed to G Joskowicz.

10 recordsLinked to original sources
PubMed1979

[Documentation of arrhythmias - the value of long-term ECG monitoring].

Computer-supported long-term ECG-analysis, must be considered as complementary to other methods of documentation concerning arrhythmias. With the introduction of computers in the last several years, exact quantification and qualification of arrhythmias, over long monitoring periods, has become possible. With this method diverse forms of documentation and data presentation enhance its value of information and increase plausibility. Major indications for long-term ECG-monitoring of ambulatory patients are detection of occult arrhythmias, evaluation of subjective symptoms such as dizziness or syncope, recognition of pacemaker dysfunctions, selection of patients with coronary heart disease at high risk and evaluation as well as control of the efficacy of antiarrhythmic therapy.

Arrhythmias, Cardiac↗
PubMed1978

Assessment of regional wall motion in coronary artery disease using radionuclide methods.

72 patients with CAD, 10 patients with congestive cardiomyopathies and 10 normal subjects were evaluated by radionuclide angiography. Comparison with contrast angiography showed good results for LVEF (r = 0.83). Regional asynergies observed in the radionuclide angiography correlated well with defects in thallium scintigrams. Extent of abnormal wall motion was measured and compared with normals, appreciating the deviation from the normal mean radial shortening. Good correlation could be demonstrated with radionuclide ventriculography. In 80% of congestive cardiomyopathies the right ventricle wall became visible in the thallium scintigram.

Cardiomyopathies↗
PubMed1978

[Circadian variations in the frequency of arrhythmia and quantitative analysis of rhythm disturbances].

In 29 patients with long term ECG monitoring the circadian rhythm of extrasystoles was investigated. A decrease of maximal frequency of extrasystoles was calculated for each hour and an increase of the minima during night was detected. In 77% of the patients also for 6 hour-segments a circadian rhythm could be calculated. The effect of the antiarrhythmic treatment on the frequency of extrasystoles was different depending on the frequency of the sinus rhythm.

Anti-Arrhythmia Agents↗
PubMed1977

A global display of the heart vector (spherocardiogram). Applicability of vector-and polarcardiographic infarct criteria.

The spatial loop of the heart vector can be projected on the Aitoff projection of the globe. The complete information that is contained in the orthogonal leads in displayed on a single graph when the vector magnitudes are indicated by the diameter of circles drawn around the vector projection in short time intervals (spherocardiogram). Diagnostic vector- and polarcardiographic criteria were applied to the spherocardiograms of 68 survivors of inferior myocardial infarction and 30 healthy men. Sensitivity increased from 65% (standard 12-lead ECG) to 87% (VCG criteria) (P less than 0.001) to 94% (VCG and PCG criteria combined), with no false-positive diagnoses. The spherocardiogram can be obtained by use of an "intelligent plotter." In contrast to the vectorcardiogram (VCG) and the polarcardiogram (PCG), it permits the direct visual study of the spatial direction and the spatial magnitude of the heart vector and of their sequential changes during the heart cycle.

Adult↗
PubMed1976

[Arrhythmia analysis--arrhythmia control (comparative studies of 4 small computers for automatic electrocardiography control)].

Four arrhythmia computers presently available on the market were tested with respect to their efficiency in identifying abnormal QRS-complexes. A considerable variation for the calculated sensitivity and specificity has been found with a highest value for sensitivity (92.9%) combined with a low specificity (72.4%), and a highest value for specificity (100%) combined with a very low sensitivity (36.6%). The best results were obtained by a computer with a sensitivity of 90.9% and a specificity of 98.5%. For the routine use of these computers in the CCU common artifacts (e.g. muscle potentials) must influence their performance in a practical way: neither should minor artifacts stop the function completely nor should the computer continue to measure with a high level of "noise". Based upon the results of these test series suggestions for the concept of arrhythmia computers for CCU are presented.

Arrhythmias, Cardiac↗