21. Fibrillation potentials and fasciculations are often also present with electromyography.22. Also, ventricular fibrillation frequently occurs below and asystole below. 23. Whether this is a description of ventricular fibrillation is debatable. 24. Spiral waves are believed to underlie phenomena such as tachycardia and fibrillation . 25. Medicare is now covering home testing for patients with chronic atrial fibrillation . 26. In 1912, Karel Frederik Wenckebach saw a man with atrial fibrillation . 27. The cause of death was ventricular fibrillation triggered by cardiomyopathy. 28. Endocardial Solutions manufactured diagnostic and therapeutic devices used to treat atrial fibrillation . 29. Right atrial myxomas are sometimes associated with tricuspid stenosis and atrial fibrillation . 30. Beck gave a second shock that wiped out the fibrillation .