Sanders undergoes heart procedure

(NBC News) Senator Bernie Sanders is taking a break from his presidential campaign after undergoing a heart procedure at a Las Vegas hospital.

In a statement, his campaign says Sanders complained of chest discomfort following an event Tuesday night.

Doctors found a blockage in one artery and installed two stents.

The 78-year old is said to be conversing and in good spirits.

The Sanders campaign has canceled his upcoming appearances so he can rest for a few days.

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