Weight changes in hot weather: a critical sign for heart patientsSudden changes in body weight during hot weather serve as a critical clinical indicator for patients with heart disease. While healthy individuals generally tolerate this stress, it poses a significant risk for patients with myocardial pathology. Weight changes in heat typically signal two opposite conditions:Rapid weight loss: Usually indicates fluid deficiency and dehydration. Risks for Heart Failure PatientsIn cases of heart failure, the body's self-regulation mechanisms are impaired. Patients taking diuretics (water pills) face a double risk: the combination of medication and natural fluid loss through the skin can result in critical dehydration and kidney dysfunction.