What are the most common symptoms of esophageal spasm?

Chest pain. It can feel like heartburn, but many people describe a pain that is similar to "angina" (which is just latin for strangling). An unpleasant squeezing or tightness in the chest. It's sometimes relieved by a belch, or antacids. Drugs like nitrates and calcium channel blockers are also effective, but not uniformly so. Sometimes antidepressants (yes, those!) work to reduce the spasms.
Chest pain. First the patient should be ruled out for coronary artery disease. Esophageal spasm can result in diffuse chest pain. Stress and cold liquids can worsen symptoms.