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According to TMZ, Liotta's cause of death was revealed as acute heart failure and pulmonary edema.
"The actor's manner of death was categorized as natural and nonviolent," TMZ reported, adding the actor also suffered from respiratory insufficiency and a thickening of the arteries (atherosclerosis).
Liotta, 67 at the time, was filming thriller "Dangerous Waters," in Santo Domingo, D.R., when he died in his sleep.
In a May 27, 2022 story, the day after his tragic passing, TMZ shared a photo of Liotta taken just days prior by a fan in Santo Domingo. "This woman who was fortunate enough to snap a selfie of the two of them says he was as kind and receptive as could be," the outlet wrote. It also reported at the time "there were no signs of health issues leading up to his death."
This is the second time in the past week that pulmonary edema has made headlines. Last week, NBC's star correspondent Morgan Chesky was hospitalized with high-altitude pulmonary edema while on a trip to Zion National Park in Utah.
"I couldn't seem to catch my breath," Chesky shared on Instagram.
"When my lungs started to fill with fluid, it forced my heart to work harder, causing my pulse to skyrocket. If not treated, staff tells me you either pass out from lack of oxygen or go into cardiac arrest," he penned. "Hard pass."
What is pulmonary edema?
Pulmonary edema is a buildup of fluid in the lungs that makes it difficult to breathe, according to Healthing.
"It usually happens when the heart does not pump blood through the body as well as it should. Blood can back up into the blood vessels that carry blood from the lungs to the heart.
"Blood pressure rises in those blood vessels, and fluid is pushed into the lungs," the website reports.
However, it can also be caused by kidney or liver failure, a poisoning, a non-fatal drowning, or similarly to Chesky's case, at high-altitudes.
"Pulmonary edema is serious," the doctor-reviewed explainer read.
Those who are diagnosed "may have trouble breathing, be restless, have a fast heart rate, or cough up foamy pink fluid."
What are the symptoms to look out for?
According to WebMD, the illness "comes on suddenly and can be life-threatening."
Those who have the following symptoms are advised to contact their doctor or call 911:
shortness of breath after activity or while lying down
feeling of drowning or suffocating
trouble breathing while sweating
breathing that sounds bubbly, wheezing or gasping
coughing up pink phlegm or blood
blue or gray-looking skin
a drop in blood pressure and feeling lightheaded or weak
How to care for pulmonary edema
Certain diet and lifestyle choices can lower the risk of pulmonary edema.
Healthing also advises staying out of high-altitude places, learning breathing methods to help airflow into the lungs and getting enough sleep.