"خفق" بالانجليزي n. pulsation, fall v. become confused, throb, baulk, pulsate, bust, come, flap, pound, dilute, bedeck, whip, collapse, fizzle out, goof, flunk, flummox, miss, go wrong, go by the board, come to grief, muddle, misfire
And then.. I would feel for a palpable murmur - or a thrill (vibration). فأحس بخفقة واضحة أو رعشة
I put it on "Whip", because I'm whipping cream! لقد قمت بخفقة , لأنني أخفق القشدة
I take it from your abrupt pause that you either had a small stroke or Sarah walked in. أستنتج من توقفك المفاجئ عن الكلام إما أنّك أصبت بخفقة حنجرة بسيطة