Definition of bisect. transitive verb. : to divide into two usually equal parts. intransitive verb.
1 Muscle Pulls: Pulls of the muscles or ligaments in the chest and injuries to the ribcage may lead to right side chest pain.  Food Blockage: Blockage of the esophagus with food or beverages causes congestion, which can lead to pain in the right side of your chest.
Pain in the middle of the chest or upper back can result from disorders of the esophagus (see Overview of the Esophagus) or from disorders of the heart or aorta (see Chest Pain). Symptoms may be similar. Gastroesophageal reflux disease (GERDâsee Gastroesophageal Reflux (GERD)), caused by stomach acid splashing up into the esophagus, can cause a burning sensation or a tightness under the breastbone (sternum), which may resemble the pain of heart disease.