If you like the spirit of science, you should be aware that the article in the New England Journal of Medicine does not represent the latest knowledge. It is based on one source from 2001.
The article from the Heart Health Center, which I posted, is based on five different sources, ranging from 2003 to 2008.
Here is another article, from 2009, answered by a doctor who is working in the field of heart failure:
Question: Can cocaine affect my risk of heart failure?
Answer: Probably the most dangerous of all the drugs to take chronically is cocaine. We know that cocaine affects the way the sympathetic nervous system affects the heart. We know that it also causes the small blood vessels in the heart to have damage. In fact, it can lead to a heart attack. And when we as cardiologists see a heart attack in a young individual who has no family history of coronary artery disease or a minimal risk factor profile, we immediately begin to ask them about the use of cocaine.
http://abcnews.go.com/Health/HeartFailureRisk/story?id=5227306#.T3Ry8tmjOSo
---------- Post added at 02:53 PM ---------- Previous post was at 02:42 PM ----------
Another two sources:
Cocaine has powerful negative effects on the heart, brain, and emotions. Many cocaine users fall prey to addiction, with long-term and life threatening consequences. Even occasional users run the risk of sudden death with cocaine use.
Cocaine is bad for the heart. Cocaine increases heart rate and blood pressure while constricting the arteries supplying blood to the heart. The result can be a heart attack, even in young people without heart disease. Cocaine can also trigger a deadly abnormal heart rhythm called arrhythmia.
http://www.webmd.com/mental-health/cocaine-use-and-its-effects
Cocaine usually makes the user feel euphoric and energetic, but also increases body temperature, blood pressure, and heart rate. Users risk heart attacks, respiratory failure, strokes, seizures, abdominal pain, and nausea.
http://www.drugabuse.gov/drugs-abuse/cocaine
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