Researchers at the University of California, Davis have published a study in Scientific Reports on the long-term effects of wildfire injuries on heart function in cats. In a group of 51 cats referred for treatment of injuries following large wildfires in 2017 and 2018, researchers found a high incidence of cardiac muscle thickening and blood clot formation via cardiac ultrasonography. The cats had a higher incidence of cardiac changes following burn injuries than is reported for human burn patients. Further study may help identify better treatment approaches for both cats and people.
More information on heart failure in animals is available in the MSD Veterinary Manual.