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.
Numbness and tingling are unusual prickling sensations that can happen in any part of your body, but they are generally noticed in hands, feet, arms, and legs. Many things can cause the feeling of numbness and tingling, including sitting with your legs crossed or falling asleep on your arm.ther conditions that can cause numbness and tingling are: 1  insect or animal bites. 2  radiation therapy. 3  abnormal levels of vitamin B12 or other vitamins, potassium, calcium, or sodium. 4  seafood toxins. 5  carpal tunnel syndrome (pressure on the nerves in your wrist).