Title: Elvis Presley
Content:  later strongly suggested that polypharmacy was the primary cause of death; one reported "fourteen drugs in Elvis' system, ten in significant quantity". In 1979, forensic pathologist Cyril Wecht conducted a review of the reports and concluded that a combination of central nervous system depressants had resulted in Presley's accidental death. Forensic historian and pathologist Michael Baden viewed the situation as complicated: "Elvis had had an enlarged heart for a long time. That, together with his drug habit, caused his death. But he was difficult to diagnose; it was a judgment call." The competence and ethics of two of the centrally 
Title: Elvis Presley
Content:  While an autopsy, undertaken the same day Presley died, was still in progress, Memphis medical examiner Jerry Francisco announced that the immediate cause of death was cardiac arrest. Asked if drugs were involved, he declared that "drugs played no role in Presley's death". In fact, "drug use was heavily implicated" in Presley's death, writes Guralnick. The pathologists conducting the autopsy thought it possible, for instance, that he had suffered "anaphylactic shock brought on by the codeine pills he had gotten from his dentist, to which he was known to have had a mild allergy". A pair of lab reports filed two 
Title: Elvis Presley
Content:  hospital records, which included two admissions for drug detoxification and methadone treatments." Writer Frank Coffey thought Elvis's death was due to "a phenomenon called the Valsalva maneuver (essentially straining on the toilet leading to heart stoppage—plausible because Elvis suffered constipation, a common reaction to drug use)". In similar terms, Dan Warlick, who was present at the autopsy, "believes Presley's chronic constipation—the result of years of prescription drug abuse and high-fat, high-cholesterol gorging—brought on what's known as Valsalva's maneuver. Put simply, the strain of attempting to defecate compressed the singer's abdominal aorta, shutting down his heart." However, in 2013, Forest Tennant, 
Title: Elvis Presley
Content:  Nashville. In early August, his mother was diagnosed with hepatitis, and her condition rapidly worsened. Presley was granted emergency leave to visit her and arrived in Memphis on August 12. Two days later, she died of heart failure at the age of 46. Presley was devastated and never the same; their relationship had remained extremely close—even into his adulthood, they would use baby talk with each other and Presley would address her with pet names. After training, Presley joined the 3rd Armored Division in Friedberg, Germany, on October 1. While on maneuvers, Presley was introduced to amphetamines by a sergeant. 
Title: Elvis Presley
Content:  By this point he suffered from glaucoma, hypertension, liver damage, and an enlarged colon, each magnified—and possibly caused—by drug abuse. On the evening of Tuesday, August 16, 1977, Presley was scheduled to fly out of Memphis to begin another tour. That afternoon, Ginger Alden discovered him in an unresponsive state on a bathroom floor. According to her eyewitness account, "Elvis looked as if his entire body had completely frozen in a seated position while using the toilet and then had fallen forward, in that fixed position, directly in front of it. ... It was clear that, from the time whatever hit him 
Title: Elvis Presley
Content:  in Elvis' name." His license was suspended for three months. It was permanently revoked in the 1990s after the Tennessee Medical Board brought new charges of over-prescription. In 1994, the Presley autopsy report was reopened. Joseph Davis, who had conducted thousands of autopsies as Miami-Dade County coroner, declared at its completion, "There is nothing in any of the data that supports a death from drugs. In fact, everything points to a sudden, violent heart attack." More recent research has revealed that Francisco did not speak for the entire pathology team. Other staff "could say nothing with confidence until they got 
Title: Military career of Elvis Presley
Content:  August 12. The officer who initially denied Presley his emergency leave was later disciplined for his actions. On August 14, Gladys died from cirrhosis. The official cause of death was listed as heart attack, but the Presleys refused an autopsy to verify it. Presley and Vernon were both devastated by her death. Her funeral was held on August 15, and Presley collapsed several times before, during, and after the service. His mother had always been the most important person in his life, and now he felt as though everything he had worked for had been for nothing. Presley's leave was extended by five days on August 18, and when he finally left to return to Fort Hood he left instructions that nothing in his mother's room was to be altered.
Title: Personal relationships of Elvis Presley
Content:  diagnosed liver problems, and Gladys's condition eventually worsened so much that she was admitted to hospital in August 1958. At that time, Elvis was in Fort Hood, Texas, to fulfill his military obligations, but he got emergency leave to see her, and a special plane was chartered to bring him home on August 12. Gladys died on August 14. Elvis and Vernon were deeply upset by her death, with Elvis "sobbing and crying hysterically," and eyewitnesses relate that he was "grieving almost constantly" for days. During and shortly after the funeral, Judy Spreckels and Nick Adams, Presley's best friends at that time, attempted to comfort the singer.
Title: Military career of Elvis Presley
Content:  service, Presley's life was affected in many ways, beginning with the death of his mother. Not long before he was to be stationed in Germany, Gladys Presley died of a heart attack brought on by acute hepatitis and cirrhosis at the age of 46. When he was stationed in West Germany, he met his future wife Priscilla Beaulieu and became dependent on stimulants and barbiturates. This unhealthy addiction eventually led to his divorce, and ultimately his death at the age of 42 in 1977. After his release from military service, Presley found a new fan base among an older age group, thanks in part to his army career and releases of ballads compared to his earlier rock and roll songs.
Title: Elvis Presley
Content:  had testified as a defense witness in Nichopoulos' trial, described his own analysis of Presley's available medical records. He concluded that Presley's "drug abuse had led to falls, head trauma, and overdoses that damaged his brain", and that his death was due in part to a toxic reaction to codeine—exacerbated by an undetected liver enzyme defect—which can cause sudden cardiac arrhythmia. DNA analysis in 2014 of a hair sample, purported to be Presley's, found evidence of genetic variants that can lead to glaucoma, migraines, and obesity; a crucial variant associated with the heart muscle disease hypertrophic cardiomyopathy was also identified.

Question: what did elvis presley died from?
Answer: Myocardial infarction.