Good for nurses, GPs and shift-working clinicians discussing difficulty falling asleep, snoring, witnessed gasping or daytime sleepiness. It links sleep cycles, circadian disruption, caffeine, alcohol, screens, naps and sleeping position to practical sleep hygiene and clinical review triggers.

Start here if cardiac arrest care still relies on instinct rather than measured CPR quality. The gain is early feedback pads, metronome support, rapid full release and a CPR coach, then using report card data to coach the next arrest better.

Perimenopause is diagnosed clinically, not by a single hormone result. When insomnia, mood change, palpitations, bleeding and urinary symptoms cluster in midlife, look for one endocrine explanation and exclude common mimics rather than treating each symptom in isolation.