[Comparative analysis of parameters of corrected and uncorrected QT-interval dispersion of magneto-, electrocardiography and isomagnetic maps in patients with ischemic heart disease].
OBJECTIVE
To compare possibilities of magnetocardiography (MCG) and electrocardiography for assessment of regional dispersion of ventricular recovery time using parameters of corrected and uncorrected QT-interval dispersion (DQTs and DQT).


METHODS
Twenty three patients with class II angina pectoris including 11 patients with history of myocardial infarction (MI) and 13 practically healthy subjects.


RESULTS
Mean DQT and DQTc were significantly higher (p<0.005) in patients than in healthy subjects according to both techniques. Values of DQT and DQTc obtained by MCG were higher in patients with history of MI compared with those without MI (p=0.006 and 0.02, respectively). There was a significant positive correlation between age and DQT and DQTc determined by electrocardiography. Mean number of T-wave dipoles was significantly higher in patients than in healthy subjects. Substantial positive correlation was found between number of T-wave dipoles on isomagnetic maps and age in both patients and healthy people.


CONCLUSIONS
The method of MCG gave supplementary information on the state of ventricular depolarization in patients with ischemic heart disease.
Shabalin
A V
AV
Tret'iakova
T V
TV
Kuznetsov
A A
AA
Motorin
S V
SV
Golyshev
N V
NV
D000328:Adult; D000368:Aged; D006348:Cardiac Surgical Procedures / Q000379:methods*; D004562:Electrocardiography; D055590:Electromagnetic Phenomena / Q000379:methods*; D005260:Female; D006801:Humans; D008133:Long QT Syndrome / Q000175:diagnosis* / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000150:complications* / Q000175:diagnosis / Q000601:surgery*; D012720:Severity of Illness Index