A Mid Wales politician was taken to hospital just hours before he was due to open Prime Minister's Questions.
Montgomeryshire MP Glyn Davies - who ousted Liberal Democrat Lembit Opik from his seat - spent three days in the Royal Shrewsbury Hospital after being taken ill.
Mr Davies, from Berriew, near Welshpool has now been released.
He said today that doctors believed he had been suffering from an irregular heartbeat.
He said he had been left feeling extremely upset after missing the Budget and Prime Minister's Questions for his maiden speech.
Mr Davies said: "I suppose the night of the General Election was an example of hitting a wall. Several people have told me I looked a bit zonked.
"Anyway, I decided to call my doctor on Monday afternoon.
"It was all I could do to stop him ordering a blue light to rush me to Shrewsbury as an emergency.
"I pleaded with him that I'd never live it down.
"It seems that long-term severe infections can have a nasty impact on the heart, and mine was thundering along like a steam train off the rails - fast and erratic.
"I was first up at PMQs and had planned my maiden speech.
"Instead I would be on my back, with a drip in my arm pumping antibiotics and glucose into my system.
"Don't suppose I will ever come up in PMQs again!"