The Labour leader Ed Miliband asked David Cameron to explain why NHS A&E targets are being missed, during Prime Minister's Questions.
"The number of people waiting more than four hours in A&E is nearly three times higher than when he came to office".
"As he approaches his third anniversary as Prime Minister, he needs to explain why an A&E crisis is happening on his watch".
Mr Cameron replied: "For the whole of last year we met the target for A&E attendance. That is a fact. If you take the number of occasions on which it was breached 15 times in the last year, That is lower than the 23 times it was breached when he was in power in 2008".
He also challenged Labour's track on the NHS saying: "They've only got to read the report into the Stafford Hospital".
"The fact is that waiting times are stable or down, waiting lists are down, the NHS is performing better under this government than it ever did under Labour", he added.