Can a new ECG finding identify individuals at risk for dying suddenly? Jason D. Roberts, MD, of McMaster University joins JAMA Associate Editor Gregory M. Marcus, MD, MAS, to discuss A Clinical Diagnostic Test for Calcium Release Deficiency Syndrome (CRDS). CRDS is a recently described cause of sudden arrhythmic death. Until now, no clinical test has existed to identify those with the disease. Related Content: A Clinical Diagnostic Test for Calcium Release Deficiency Syndrome The First Clinical Test for Calcium Release Deficiency Syndrome?