ECG Challenge: Rushing to the ED With Chest Pain A 67-year-old man with no cardiac history has a sudden bout of chest pain, but his labs come back normal. What does his ECG show? Clinical Case ...

Rhythm disturbances are found in 30% of cases. Arrhythmias are more frequent with missense variants rather than other variants, and may present several conduction disorders, such as sinus bradycardia, ...