Table 2.
A description of the heart rate variability (HRV) and electroconvulsive therapy (ECT) devices and the location of the stimulating electrodes
| Study, year | HRV recording device | ECT device | The location of the stimulus electrodes |
|---|---|---|---|
| Schultz et al.,[25] 1997 | A continuous ECG using standard chest leads (Biotach and Pneumotrace, Gould Electronics, Valley View, OH) | Constant current bidirectional square wave stimulus device (MECTA Model SR-1) (MECTA Corporation) | Bilaterally in the standard bifrontotemporal position |
| Nahshoni et al.,[31] 2001 | One unfiltered ECG limb lead (LII) (Hipec analyzer HA-200/Aerotel Computerized Systems, Ramat Gan, Israel) | Constant-current, brief bidirectional square-wave device (Thymatron DGx; Somatics Inc.) | Right or left unilateral (d’Elia placement) ECT in all patients except one, whose bilateral (frontotemporal) ECT |
| Nahshoni et al.,[28] 2004 | One unfiltered ECG limb lead (LII) (Hipec analyzer HA-200/Aerotel Computerized Systems, Ramat Gan, Israel) | Constant current, brief bidirectional square-wave device (Thymatron DGx, Somatics, Lake Bluff, Illinois) | Right or left unilateral (d’Elia placement) ECT in all patients except one, who bilateral (frontotemporal) ECT |
| Karpyak et al.,[32] 2004 | Holter monitoring | Thymatron System IV ECT device (Somatics, Inc., Lake Bluff, IL) | In seven patients, bitemporal electrodes and in four patients, a combination of bitemporal and bifrontal electrodes |
| Takada et al.,[26] 2005 | ECG Holter monitoring with Marquette 800 portable amplitude-modulated two-channel devices (Marquette 9428; Marquette Medical Systems Milwaukee, WI, USA) | Mecta SR-2 (Lake Oswego, OR, USA) and Thymatron DGx (Lake Bluff, IL, USA) | Temporal areas |
| Ebert et al.,[9] 2010 | A high-resolution ECG (1000 Hz) from two separate adhesive monitoring electrodes using the Task Force Monitor-device (CNSystems, Medizin-Technik GmbH, Austria) | Spectrum 5000Q-device of unilateral stimulation (MECTA, Portland, Oregon, USA) | Unilateral stimulation |
| Royster et al.,[29] 2012 | Marquette Series 8500 Holter monitor (GE Marquette Medical Systems, Milwaukee, WI, USA) | NR | Bilateral stimulation |
| Bozkurt et al.,[27] 2013 | Twenty-four-hour Holter monitoring | Bilateral ECT device Mecta Spectrum 5000Q | Bilateral stimulation |
| Suzuki et al.,[30] 2015 | ECG from two separate adhesive monitoring electrodes, which were placed on the positive input of V5 (12-lead ECG) and under the right clavicle as the reference with LRR-03 (GMS) | Pulse wave machine (Thymatron System IV; Somatics LLC, Lake Bluff, IL) | Bilateral frontal poles |
NR=not reported