2014 was a rocky year for Calvin Harris.

In a tweet on Wednesday, the DJ looked back on that year in which he hit No. 1 on the UK charts with his single “Summer”, reached No. 2 with his album Motion, and played a big set at EDC during the summer.

He then revealed that it was all followed up by his heart stopping and having to be restarted at the ER.

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That same year, Harris was forced to cancel his MTV EMA performance due to heart problems.

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The DJ later revealed that he had been diagnosed with arrhythmia, a condition affecting the heart’s rhythm. As a result, Harris made a number of lifestyle changes, including giving up alcohol.