Cardiac arrest? Doubtful. BP during exercise can get that high (though usually not that high diastolic). When you're giving birth though, that's a pretty big event... emotional and I'm sure it's a hell of a workout. What's your resting BP?
No,not for a short term peak;
but a BP like that SUSTAINED over weeks or months is VERY bad for the kidneys and increases risk for aneurism and stroke considerably.!