What might Jack's weight gain indicate in conjunction with his heart condition?

Weight gain in a patient with a pre-existing heart condition often suggests fluid retention, a condition known as edema. When the heart is not functioning optimally, it may struggle to effectively pump blood throughout the body. Consequently, fluid can accumulate in various tissues, leading to an increase in weight. This is particularly concerning in individuals with heart issues, as fluid overload can exacerbate cardiac problems, increase blood pressure, and contribute to further complications like congestive heart failure. Recognizing weight gain as a potential sign of fluid retention allows healthcare providers to closely monitor the patient's condition and adjust treatment as necessary to prevent complications.