Now let me search the medical library for ECG changes in common heart diseases. I'll run multiple parallel searches to cover all 10 conditions efficiently.

Good - found key sections. Now let me read the most relevant blocks for ECG content and images simultaneously.

Excellent content. Now let me get more ECG images and content for remaining conditions - VT, BBB, pericarditis, and read the STEMI ECG section more closely.

Now let me fetch the pericarditis ECG content and additional images for VT, BBB, LVH, and Atrial Fibrillation:

Excellent! Now let me get the AV block ECG content and images, plus additional content for the atrial fibrillation ECG image:

Now let me get the AV block ECG images and the atrial fibrillation ECG image:

Now let me get the AF ECG image and continue with LVH and VT images:

Now let me fetch the LVH and BBB ECG images from Harrison's, and also get the AF ECG image:

I now have all the content and images I need. Let me search for the AF ECG image and also get the LVH image specifically:

I now have comprehensive content and all the ECG image URLs. Let me also quickly fetch the AF ECG image specifically:

I now have all the content needed. Let me find the AF ECG figure image directly:

I now need to find the actual AF ECG image. Let me check around the AF section:

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