Neil Critchley says Hearts nearly gave him a "heart attack" as his much-improved but wasteful side eventually held off Motherwell for an important Scottish Premiership victory.
Musa Drammeh profited from loose goalkeeping from Aston Oxborough to open the scoring after seven minutes and give Hearts the lead.
The close-range strike was initially ruled out for a foul on the Motherwell goalkeeper by James Wilson, but referee Calum Scott was sent to the monitor for a review and he overturned the original call after seeing minimal contact from the Hearts striker.
That goal turned out to be the winner but that should not have been the case for Hearts, who were totally dominant but could not find a second despite 17 shots.
That meant a nervy finish at Tynecastle, with memories of Hearts' late collapse against Ross County last time out still fresh.
And in the end goalkeeper Craig Gordon, the villain in Dingwall, pulled off two superb late saves to maintain their lead and ensure a morale-boosting win which moves Hearts five points clear of bottom side St Johnstone.
"I said to the players at the end - 'You're going to give me a heart attack'," Critchley told BBC Scotland.
"I was delighted with the performance until the last little part of the game.
"That was understandable because of the result and situation against Ross County. Probably a bit of nervousness set in.
"The game should have been over really, but Craig [Gordon] has produced two magnificent saves. We deserved that, but he's won us the game at the end."
Motherwell, meanwhile, stay in sixth place after one of their poorer performances this season.