What is a key concern for users of marihuana with preexisting heart issues?

The key concern for users of marihuana with preexisting heart issues lies in the potential cardiac dangers associated with its use. Marihuana can affect the cardiovascular system, often leading to increased heart rate, higher blood pressure, and changes in blood flow, which may exacerbate existing heart conditions. For individuals with heart issues, these effects can considerably raise the risk of complications, including heart attacks or arrhythmias, making it essential for them to exercise caution when using marihuana. In contrast, the other options do not align with the established medical perspective on marihuana's effects on individuals with heart problems. Reduced heart rate and improved circulatory health do not accurately reflect the typical cardiovascular impacts of marihuana, while increased muscle tone is unrelated to cardiac health concerns.