Graphic content: Doctors shocked after man coughs up lung clot

Graphic content: Doctors shocked after man coughs up lung clot

The patient had a pacemaker fitted due to a history of poor cardiovascular health, according to the New England Journal of Medicine.

While that, in and of itself, is something astounding, the medical staff treating the unnamed man were astonished to find that, given his unique medical circumstances, the man had actually expectorated a perfectly intact cast of his right bronchial tree, one of the tubular networks that brings air to and from the lungs.

The 36-year-old was admitted to University of California San Francisco Medical Center with heart failure.

The patient had a violent coughing fit in hospital a week after surgery to fit him with a pacemaker in case his heart became blocked.

"We were astonished", pulmonary surgeon Georg Wieselthaler told The Atlantic of the clot.

The anti-coagulants the man was taking forced blood out of his pulmonary system and into his right lung.

A man who later died stunned doctors by coughing up a six-inch-wide blood clot from his lungs in the near-perfect shape of his right bronchial tree.

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Dr Wieselthaler carefully spread out the coughed-up clot, realising it was the ideal shape.

Reports say the man had a rare ejection fraction deficiency (which relates to how much blood is pumped with each contraction), which meant his organ was operating at around 50 percent less than the normal rate.

Fibrinogen is a type of protein in the blood that works to glue platelets together.

The patient died a week later from heart failure complications, the journal reported.

Doctors working at the hospital said the man instantly felt better after coughing up the clot but the size of it suggested the 36-year-old's condition was severe. "The patient's trachea was subsequently intubated, and flexible bronchoscopy revealed a small amount of blood in the basilar branches of the right lower lobe".

The 25-year-old mum went on to recover fully and delivered a healthy, full-term baby soon after.

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