Before 2000 it was speculated that if a Heart was still beating and you administered CPR you could put the heart out of it's natural rhythm and cause it to stop. However since 2000 it is advised that if someone is unconscious and not breathing CPR should be administered regardless of if the heart is beating or not. The Chest Compressions in the Cardio Pulmonary Resuscitation may put strain on the heart but its natural sinus Rhythm shouldn't be interrupted.
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No, it is a first response for a non beating heart. it's like saying can adding oxygen to a rooom harm your breathing.
In order to restart the heart, from asystole, drug therapy is usually required; such as epinephrine, vasopressin, or atropine. A shock may still be applied. If the heart is in arrhythmia, it will require a shock to reset the heart. CPR will not bring the heart back to a normal rhythm, or restart the heart. CPR will circulate oxygenated blood until help arrives to administer shocks or drug therapy.
Use the brachial pulse to to assess the heart rate in an infant during CPR.
You will die. (With the exception of a sneeze)
The heart is being mechanically compressed between the sternum and the spinal column. This external mechanical compression is what forces the heart to pump blood. There is not a specific anatomical part of the heart that CPR is performed on.