6 doctors weighed in:
How did the earlier versions of the implantable cardioverter-defibrillator function?
6 doctors weighed in

Dr. John Garner
Internal Medicine - Cardiology
2 doctors agree
In brief: I Agree, and...
I agree with dr. Hahn's answer and would add that the earlier devices used an electrical pulse which is inferior to the one currently used.
The result was that more energy was required for a successful shock and more patients could not be successfully shocked out of a dangerous rhythm on the first attempt. The earlier devices also had no ability to tell safe from dangerous rhythms.

In brief: I Agree, and...
I agree with dr. Hahn's answer and would add that the earlier devices used an electrical pulse which is inferior to the one currently used.
The result was that more energy was required for a successful shock and more patients could not be successfully shocked out of a dangerous rhythm on the first attempt. The earlier devices also had no ability to tell safe from dangerous rhythms.
Dr. John Garner
Dr. John Garner
Thank
Dr. Samuel Hahn
Internal Medicine - Cardiology
2 doctors agree
In brief: Similar
The first icds required surgeons to place patches on the surface of the heart and the patches were connected by wires to the generator which was a large bulky device placed under the skin in the abdomen.

In brief: Similar
The first icds required surgeons to place patches on the surface of the heart and the patches were connected by wires to the generator which was a large bulky device placed under the skin in the abdomen.
Dr. Samuel Hahn
Dr. Samuel Hahn
Thank
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