What's a simple way to say what cardiospasm really is?

Temporary narrowing: Temporary narrowing of blood vessel to heart causing obstruction of blood flow and chest pain. Usually resolves with nitroglycerine. The condition is called prinzmetal angina and is diagnosed by abnormal ekg showing st segment elevation when you are having chest pain but resolved within a few minutes, .

Coronary spasm?: If your asking about coronary artery spasm the it's simply arteries that close down not due to a blockage but due to the muscular layer of the artery going in to spasm. The things that cause this include cold weather , emotional stress and physical activities. Nicotine and caffiene are also implicated. Nitrates and calcium channel blockers are the treatment.

Achalasia: This is a disease where the nerves of the esophagus no longer function to coordinate the muscles to push down food, or send a signal to the lower valve of the esophagus at the entrance to the stomach to open an let the food in. Cause usually unknown. Most effective and most invasive treatment is surgically cutting the muscle of the valve, that can be done laparoscopically or endoscopically (poem).