February 2018 Monthly, Weekly and Daily Validated Holidays, Calendar, and Observances.
When to see a doctor. Arrhythmias may cause you to feel premature or extra heartbeats, or you may feel that your heart is racing or beating too slowly. Other signs and symptoms may be related to your heart not pumping effectively due to the fast or slow heartbeat. These include shortness of breath, weakness, dizziness, lightheadedness, fainting or near fainting, and chest pain or discomfort.
1 Rapid heart beat and Respiratory symptoms (759 causes) 2  Rapid heart beat and Muscle symptoms (754 causes) 3  Rapid heart beat and Breath symptoms (728 causes)  Rapid heart beat and Breathing difficulties (722 causes)