Question

 What causes a racing heartbeat?

Answer When you are at rest, your heart should beat between 60 and 80 times per minute. A rapid heartbeat--a heartbeat that is faster than 60 to 80 times per minute--can be caused by many things and is no... Read More »
http://www.answerbag.com/q_view/1901320

Top Q&A For: What causes a racing heartbeat

If you are three weeks pregnant with twins but the doctor saw only one heartbeat on the ultrasound and your hcg was 3045 will the other baby develop a heartbeat eventually?

Answer Three weeks pregnant is a week before you miss a period so it is impossible to know it is twins. If you are three weeks after conception, (5 weeks pregnant)it is still early to see a heart... Read More »
http://wiki.answers.com/Q/If_you_are_three_weeks_pregnant_with_twins_but_the_doctor_saw...

What is a heartbeat?

Heartbeats are expansions and contractions of the heart muscle that feed blood into the circulatory system and ultimately provide the oxygen supply for the entire body. Each heartbeat is controlled... Read More »
http://www.answerbag.com/q_view/1909447

Why do you hear your heartbeat in your ear?

You don't really hear your heartbeat. It's your blood pulsing close to your eardrum.
http://wiki.answers.com/Q/Why_do_you_hear_your_heartbeat_in_your_ear

Is my heartbeat too slow?

Everyone has different breathing patterns and it usually depends how athletic you are and stuff :) I'm sure you are perfectly normal.
http://answers.yahoo.com//question/index?qid=20120827000516AAf5utq


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