Researchers reported in the International Journal of Cardiology, "Marijuana use by older people, particularly those with some degree of coronary artery or cerebrovascular disease, poses greater risks due to the resulting increase in catecholamines, cardiac workload, and carboxyhemoglobin levels, and concurrent episodes of profound postural hypotension. Indeed, marijuana may be a much more common cause of myocardial infarction than is generally recognized. In day-to-day practice, a history of marijuana use is often not sought by many practitioners, and even when sought, the patients response is not always truthful".A 2013 analysis of 3,886 myocardial infarction survivors over an 18-year period showed "no statistically significant association between marijuana use and mortality".A 2008 study by the National Institutes of Health Biomedical Research Centre in Baltimore found that heavy, chronic smoking of marijuana (138 joints per week) changed blood proteins associated with heart disease and stroke.A 2000 study by researchers at Bostons Beth Israel Deaconess Medical Center, Massachusetts General Hospital and Harvard School of Public Health found that a middle age persons risk of heart attack rises nearly fivefold in the first hour after smoking marijuana, "roughly the same risk seen within an hour of sexual activity".Cannabis arteritis is a very rare peripheral vascular disease similar to Buergers disease. There were about 50 confirmed cases from 1960 to 2008, all of which occurred in Europe. Combination with other drugs
A confounding factor in cannabis research is the prevalent usage of other recreational drugs, especially alcohol and nicotine.
Scleroderma is a disease characterized by atrophy and sclerosis of the gut wall, most commonly of the distal esophagus (~90%). Consequently, the lower esophageal sphincter cannot close and this can lead to severe gastroesophageal reflux disease (GERD). Patients typically present with progressive dysphagia to both solids and liquids secondary to motility problems or peptic stricture from acid reflux. Spastic motility disorders include diffuse esophageal spasm (DES), nutcracker esophagus, hypertensive lower esophageal sphincter, and nonspecific spastic esophageal motility disorders (NEMD). DES can be caused by many factors that affect muscular or neural functions, including acid reflux, stress, hot or cold food, or carbonated drinks. Patients present with intermittent dysphagia, chest pain, or heartburn.Rare causes of esophageal dysphagia not mentioned above

Diverticulum
Aberrant subclavian artery, or (dysphagia lusoria)
Cervical osteophytes
Enlarged aorta
Enlarged left atrium
Mediastinal tumor

Diagnostic tools
Once a patient complains of dysphagia they should have an upper endoscopy (EGD). Commonly patients are found to have esophagitis and may have an esophageal stricture. Biopsies are usually done to look for evidence of esophagitis even if the EGD is normal. Usually no further testing is required if the diagnosis is established on EGD. Repeat endoscopy may be needed for follow up. If there is a suspicion of a proximal lesion such as:

history of surgery for laryngeal or esophageal cancer
history of radiation or irritating injury
achalasia
Zenkers diverticuluma barium swallow may be performed before endoscopy to help identify abnormalities that might increase the risk of perforation at the time of endoscopy.