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![Atrioventricular block (AV block) ECGs](http://d3e1m60ptf1oym.cloudfront.net/776a5224-9e7d-4a01-b9e8-9472b6d5caac/ecg_AV_blocks_large.jpg)
![Chest leads ecg, 3D animation.](http://d38zjy0x98992m.cloudfront.net/5c3df7ca-6439-4f4b-a6d2-e88242a104f0/ecg_chest_lead_view_large.jpg)
Chest leads ecg, 3D animation.1970-01-01T00:00:00+00:00Precordial leads V1 to V6 electrical views of the heart in 3D : EKG changes as the heart turns - typical normal ecg patterns from V1 to V6PT8Shttps://d38zjy0x98992m.cloudfront.net/5c3df7ca-6439-4f4b-a6d2-e88242a104f0/ecg_chest_lead_view_xlarge.jpghttps://d38zjy0x98992m.cloudfront.net/5c3df7ca-6439-4f4b-a6d2-e88242a104f0/ecg_chest_lead_view_mp4_hd_video.mp4