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.
Evaluating the severity of your other symptoms will help you determine what is causing the numbness in your arm and whether medical attention is necessary. Tingling in the left arm is often described as a pricking or abnormal sensation. Occasionally a burning or numb sensation will accompany this symptom. Tingling or numbness in the left arm is known as paresthesia, and can be caused by a number of different ailments. In most cases this is a sign that blood flow or nerve function in the arm is being interrupted.