Ross MacKenzie, MD. A short PR interval may be associated with an otherwise normal. electrocardiogram or a myriad of bizarre electrocardiographic ab-. normalities. Clinically, the individual may be asymptomatic or ex-. perience a variety of complex arrhythmias, which may be disabling. and rarely cause sudden death.
Pain, numbness and tingling of the left arm may signal a cardiac emergency. Photo Credit: Comstock Images/Stockbyte/Getty Images The person walking into an emergency room with symptoms of pain, numbness and tingling in the left arm should be prepared for a series of tests to rule out a heart problem. This is not because a heart problem is the most common cause of these symptoms, but because it is the most serious of the possible causes, and the one that demands immediate medical treatment.
1 If you have tingling and numbness in your left arm, it usually indicates a problem with a disk in your neck around C6/C7 (cervical spine). 2  Of course it depends on where the pain numbness is and how far down it reaches.