Patients randomized to screening will undergo a 30-second ECG using the Kardia Mobile device (AliveCor Inc, Cupertino, CA) paired with an iPad (Apple, Cupertino, CA). If the mobile ECG shows possible AF or unclassified, then patients will undergo a 12-lead standard ECG during the same visit, read by a cardiologist, to verify the correct diagnosis.

For patients in the usual care arm, medical record review will be done at end of study to assess for the newly diagnosed AF during the study period.

30-second ECG using the Kardia Mobile

To compare the incidence of newly diagnosed AF with point-of-care screening using a mobile, single-lead ECG versus usual care, in patients with a diagnosis of solid cancer. In this open-label, prospective pilot RCT, patients (n=480) with AF and solid cancer presenting for an outpatient visit will be randomized 1:1 to screening versus usual care. A 30-second screening ECG will be done using the Kardia Mobile device (AliveCor Inc, Cupertino, CA) paired with an iPad. The Investigators will compare the incidence of newly diagnosed AF identified by screening versus usual care.

To determine the effect of screening-detected AF on initiation of anticoagulation. Patients diagnosed with AF through screening will be referred to their primary care physician for initiation of anticoagulation based on their CHA2DS2VASc score.The Investigators will conduct chart review at the end of study to compare the proportion of patients appropriately initiated on anticoagulation between screening versus usual care.