Pulsus tardus et parvus is a medical condition that refers to a slow and weak pulse. If you are looking for synonyms for the term pulsus tardus et parvus, you can consider using words such as bradycardia, weak pulse, slow-heartbeat, or weak heart rate. Bradycardia is a condition in which the heart rate is abnormally low, commonly less than 60 beats per minute. Weak pulse or slow-heartbeat refers to the low pulse rate that is weak and difficult to feel. This condition can be caused by several underlying illnesses such as heart block, hypothyroidism, or heart valve disease.