license: This image is a derivative work of the following images: File:ECG-P+QRSkomplex+T.svg licensed with Copyrighted free use 2009-09-23T10:10:43Z Kychot 992x744...
license: This image is a derivative work of the following images: File:ECG-PQRST+popis.svg licensed with Copyrighted free use 2009-09-23T10:06:16Z Kychot 992x744...