Symptoms include dizziness, lightheadedness, altered vision (blurred vision, white outs, gray outs, black outs, double vision),
fainting, anxiety, exercise intolerance, fatigue, headache, heart palpitations, sensation of difficulty breathing or swallowing,
sweating, weakness, nausea, mental confusion, muscle tremors, hearing disturbances (including impaired hearing, crackles and tinnitus), pain in the neck/shoulder, low back pain.