Medical examiner releases preliminary findings in Lindsey Graham's death as death certificate remains pending

The District of Columbia's Office of the Chief Medical Examiner on Sunday released preliminary findings indicating Sen. Lindsey Graham suffered an aortic dissection due to arteriosclerotic cardiovascular disease before his death.

The medical examiner emphasized that the findings are not final and that Graham's death certificate will remain pending while toxicological and microscopic testing is completed.

"The preliminary examination findings were: Aortic Dissection due to Arteriosclerotic Cardiovascular Disease," the medical examiner's office said in a statement.

SEN. LINDSEY GRAHAM DEAD AT 71 AFTER 'BRIEF AND SUDDEN' ILLNESS, OFFICE SAYS

The office emphasized that the findings are preliminary and that Graham's death certificate remains pending. Officials said toxicological and microscopic testing must be completed before the death certificate is updated to reflect the cause and manner of death.

An aortic dissection is a tear in the inner layer of the aorta, the body's largest artery, that allows blood to flow between the layers of the vessel wall, according to the Mayo Clinic. The condition is considered a life-threatening medical emergency that can lead to severe internal bleeding or organ damage.

Arteriosclerotic cardiovascular disease refers to the buildup of plaque inside the arteries, which can restrict blood flow and increase the risk of serious heart and vascular complications.

LINDSEY GRAHAM, SOUTH CAROLINA SENATOR WHO ROSE FROM SMALL-TOWN ROOTS TO GOP POWER BROKER, DIES AT 71

The release of the preliminary findings comes after Graham, 71, died Saturday night, shocking colleagues in Washington and across the nation.

Graham, a Republican who was first elected to the Senate in 2002 after serving four terms in the House of Representatives, became one of the chamber's most influential voices on national security, foreign policy and the judiciary. He chaired the Senate Judiciary Committee during President Donald Trump's first term and was one of the president's closest allies on judicial nominations and defense policy.

Following news of Graham's death, tributes poured in from lawmakers across the political spectrum, with colleagues remembering his decades of public service and his influence on some of the Senate's most consequential debates.

The Office of the Chief Medical Examiner said it will update Graham's death certificate after toxicological and microscopic testing is complete.