Medical, ECG and breathing

ECG and breathing

Author	Message
Arnaldo Manuel Batis #1 / 3	ECG and breathing Dear Readers, I'm taking High resolution ECG's using a bipolar lead configuration (over the left precordium, or sometimes beteween V6R and V5L). With this lead configuration, I don't seem to have much baseline variation due to breathing, but I wonder if there is other lead configuration that performes better concerning this. Must be bipolar, due to hardware limitations. Please send me your opinions and/or paper references. Thank You Arnaldo Batista
Sun, 17 Nov 1996 00:05:16 GMT

Rory Jaf #2 / 3	ECG and breathing A big factor, no matter the lead placement, is the high-pass filter cut-off frequency. I don't know what your requirements are, but if you are not worried about low-frequency features (e.g. ST segment displacement) you can move the filter to .3 Hz from the typical .03 Hz and reduce baseline drift. The other thing you can do is use a filter with a rapid rolloff (the minimum requirement is 3dB/octave, but you can easily do better). -- Rory S. Jaffe, University of California, Davis Department of Anesthesiology _ /\| \'o.O' ack! =(___)= U
Sun, 17 Nov 1996 03:22:57 GMT

Haris S #3 / 3	ECG and breathing Quote: >Dear Readers, >I'm taking High resolution ECG's using a bipolar lead configuration >(over the left precordium, or sometimes beteween V6R and V5L). With >this lead configuration, I don't seem to have much baseline variation due to >breathing, but I wonder if there is other lead configuration that >performes better concerning this. Must be bipolar, due to hardware >limitations. >Please send me your opinions and/or paper references. >Thank You >Arnaldo Batista Here's a wild idea. Since (presumably) the interference due to respiration is due to the movement of the heart and the changes in impedance as the lungs fill with air, you might reduce those effects if you position the reference of your bipole on the chest surface near the base of the ventricle and the positive lead of your bipole on the chest surface near the apex. Like I said, it's just an idea.
Sun, 17 Nov 1996 07:51:17 GMT

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