I sometimes get this weird shock-like feeling in my throat, and it kind of feels like its coming from my heart. I've already done some heart tests like an ECG and 2D echo, and both results were normal. This sensation just hits me out of nowhere. Could you help me figure out what this might be?

This sensation you are experiencing could be due to a condition called esophageal spasms. Esophageal spasms are abnormal contractions of the muscles in the esophagus, which is the tube that carries food from the mouth to the stomach. These spasms can sometimes cause a sensation of a shock-like feeling in the throat. To help alleviate these symptoms, you can try taking a medication like Diltiazem (brand name Cardizem) under the guidance of your doctor. The usual dosage for esophageal spasms is around 30-60 mg three to four times a day. Additionally, avoiding triggers such as hot or cold foods, caffeine, and alcohol may also help reduce the frequency of these spasms. If the symptoms persist or worsen, it is important to follow up with your healthcare provider for further evaluation and management.