[Clinical efficacy of non-invasive evaluation of intra- and interatrial conduction in patients with ischemic heart disease]. / Klinicheskaia otsenka ispol'zovaniia neinvazivnogo metoda opredeleniia vnutri- i mezhpredserdnoi provodimosti u bol'nykh ishemicheskoi bolezn'iu serdtsa.

AIM: To try feasibility of non-invasive registration of intra- and interatrial conduction by means of simultaneous registration of echo-CG (in B and M modes) and ECG. MATERIALS AND METHODS: The time of intra- and interatrial conduction was measured at simultaneous registration of echo- CG (B and M modes) and ECG in standard lead II. The time of atrial conduction was registered in ms from the start of ECG wave "P" to beginning of echo-CG mechanical contractions. The results were compared to those obtained at the direct method (registration of atrial conduction by electrode fixed on the atrial myocardium). RESULTS: The data by the two above methods showed high correlation (for intraatrial conduction r = 0.93, for the interatrial one r = 0.85). The study confirmed the leading role of end-diastolic volume of the left ventricle and/or uneven wave movement along the atria in development of supraventricular arrhythmia in coronary heart disease. CONCLUSION: The proposed non-invasive method can find application for estimation of atrial conduction both in clinical practice and experiment. The time of exitation conduction through the atria measured by the new non-invasive method and the direct method is almost the same.