Glad you are OK. Be careful what you eat, as we don't want your arteries clogged back up. Exercise is important too, but a doctor should approve it first. Of course, they've told you all that, I'm sure.

Arrythmia can be restored to normal beats by zapping you with a synchronised defibrillator. No, I'm not a doctor, or even any kind of medical professional, I encountered these things as an engineer.

Your heartbeat has a waveform with specific parts referred to as PQRST. I think the defibrillator has to be synchronised to zap you on the R part of the waveform, as best as I can recall (see, I said I wasn't a doctor). I do know what the 'good' waveform should look like, and I know that zapping someone on the T part of the waveform is very bad news. The chap who taught me about all this wasn't a doctor either, but a government scientist.

Of course, the old fashionned way is to watch a 'scope and then press the button to zap the patient at the right time, when using one of the old style defibrillators that aren't synchronised to your heart. All they do is charge a capacitor up to a few thousand volts, which is then discharged across your heart! Give me an oscilloscope to watch your heartbeats and a high voltage light fitting to zap you with and I can bring you back to life ... or accidentally kill myself by getting shocked myself!

Defibrillating you saves you from dying, but it doesn't fix the underlying problem, of course.

Snow shovelling is a worrying business when you reach a certain age. I had to dig out three feet of snow from my circular driveway this time, and often worried that something similar would occur. I am not getting any younger and think it is time I got a snow blower or something in that line. Best case scenario I might not be able to dig out enough to get to work after the snow, and the worst case I would rather not dwell on.