"While he is out on medical leave, Representative Horsford will be regularly briefed on Congressional actions and his district and DC staff will be fully available to serve his constituents," his office said.

Horsford was elected to the House last year to represent Nevada's 4th congressional district — a new district created as a result of the 2010 Census. He sits on the Homeland Security and Oversight and Government Reform committees.

In the statement, Horsford's office said the congressman "appreciates the concern and prayers of his constituents and colleagues and looks forward to returning to work shortly."

"From this experience, Representative Horsford and his loved ones are encouraging all families to learn more about heart disease and to take steps to prevent and treat it."