[Continuous recordings of the echocardiogram and electrocardiogram through the night in patients with nocturnal angina: "All-night echocardiography"].
Continuous observation of the left ventricular (LV) wall motion through the night has not been reported yet. So we developed the long-term recording system of the echocardiogram through all of the night, which was proved useful in a clinical setting. In order to record a long-term echocardiogram, a superimposed echocardiogram of each cardiac cycle was developed on the monitor television by using QRS complex as its trigger. This monitor view has a capacity to display such an echocardiogram with 2-channel electrocardiogram (ECG). Sudden changes of the cardiac motion during the recording were easily detected on the monitor view. These pictures were also recorded on the video cassette recorder through the video camera. We call this system "All-night echocardiography". Complete review of the video tape for 10 hours was possible for only 50 minutes by changing the speed of the review tape (one-twelfth of real time). A probe (Monitoring Probe) was fixed on the chest wall during the recording. "All-night echocardiograms" were recorded in eight patients for 10 hours in total 10 nights. LV posterior wall (PW) monitoring was succeeded in 3 patients for 4 nights during the anginal attack. Systolic motion of LVPW was decreased with ST elevation in a VF in the simultaneous ECG during spontaneous attack (Fig. 5).
D000787:Angina Pectoris / Q000175:diagnosis*; D000818:Animals; D004285:Dogs; D004452:Echocardiography / Q000295:instrumentation* / Q000379:methods; D004562:Electrocardiography / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D009551:Night Care / Q000379:methods