That's the answer to your description's question: before or on the 51st ball drawn. But since your heading asks a slightly different question, I'll also answer your heading's question, which is just before 51 balls.
Looking for the definition of AFIS? Find out what is the full meaning of AFIS on Abbreviations.com! 'Automated Fingerprint Identification System' is one option -- get in to view more @ The Web's largest and most authoritative acronyms and abbreviations resource.
Atrial fibrillation (AFib, AF) is a common type of heart rhythm abnormality with symptoms like dizziness, fainting, weakness, fatigue, shortness of breath. There are different types of AF, like paroxysmal and nonvalvular. Medications, electrocardioversion, Medical treatment is necessary to treat this type of heart disease.