What is a significant risk associated with unstable plaque in the arteries due to viral illness?

Unstable plaque in the arteries is a critical concern because it can lead to severe cardiovascular events. When plaque becomes unstable, it is more prone to rupture, which can result in the formation of a blood clot. This clot can obstruct blood flow to the heart muscle, leading to a heart attack. The presence of viral illness can exacerbate inflammation and stress within the vascular system, increasing the likelihood that unstable plaque will lead to these dire outcomes.

In contrast, other options such as lowered heart rate, increased exercise capacity, and decreased blood pressure do not directly relate to the acute risks posed by unstable plaque. These factors may have other health implications, but they do not specifically indicate the hazards associated with the presence of unstable plaque in the context of viral illness, particularly regarding the immediate risks of cardiovascular events like heart attack.