Human heart and its electrical system, 3d illustration. The yellow lines demonstrate the electrical (conduction) system of the heart. The heart at right shows an irregular heartbeat (arrhythmia) and atrial fibrillation. — Stock photos

"Human heart and its electrical system, 3d illustration. The yellow lines demonstrate the electrical (conduction) system of the heart. The heart at right shows an irregular heartbeat (arrhythmia) and atrial fibrillation." is an authentic stock image by ScienceRF. It’s available in the following resolutions: 1600 x 760px, 2600 x 1234px, 6800 x 3228px. The minimum price for an image is 49$. Image in the highest quality is 6800 x 3228px, 300 dpi, and costs 449$.