The Iron Sheik passed away on June 7 at 81 years old. Now, official records have revealed the pro wrestling legend’s cause of death.

According to his death certificate, obtained by TMZ, The Iron Sheik died of cardiac arrest. The manner of his death was ruled to be of natural causes. The document also noted that Sheik (Hossein Khosrow Ali Vaziri) suffered from congestive heart failure and hypertension prior to his death.

The Iron Sheik is a former WWF Champion. He is still the only Iranian champion in WWE history. Hulk Hogan beat him for the title, a victory that many people credit as the start of the “Hulkamania” phenomenon. He also won the WWF Tag Team Champion with Nikolai Volkoff at WrestleMania on March 31, 1985.

Sheik was inducted into the WWF Hall Of Fame in 2005. In recent years, he remained a fixture in pro wrestling circles due to his hilarious social media account.

More must-reads:

TODAY'S BEST
Do Oilers need more from Connor McDavid to get to Stanley Cup Final?
All-Rookie teams show gems available all over draft
The NBA has not witnessed this much parity in 50 years
Knicks expected to be 'aggressive' in upgrading their roster
Drew Bledsoe offers advice for Patriots rookie QB Drake Maye
2024 AFC revenge games: Brothers, 'Stefon Diggs Bowl' to take center stage
2024 NFC revenge games: Which game should Cowboys, others have circled?
How All-Star Race victory could turn Joey Logano's season around
Xander Schauffele's triumph could open the floodgates for his career
Anderson Silva, Chael Sonnen will finish off their trilogy in a boxing ring
Ranking the five best MLB free-agent signings of offseason
Veteran WR, former first-round pick announces NFL retirement
Oilers advance to West Final again after holding off Canucks in Game 7
Bengals star WR not expected to sign franchise tender before OTAs
Red Sox RHP diagnosed with ligament damage in elbow
Watch: Caitlin Clark shows off range with logo three, but Fever fall short
Former Dolphins receiving leader announces his retirement from NFL
Detroit Lions dominate PFF's top-25 players under 25
Hall of Famer, legendary Raiders offensive lineman dead at 86
Report: Cavs owner 'would never' trade Donovan Mitchell to this team