This bubble chart visualizes the relationship between stress level, average heart rate, and vessel count, with color indicating the presence of heart disease. It uses a D3.js v7 SVG rendering, with a linear scale for both axes and a separate scale for bubble size. The chart includes interactive tooltips on mouseover that display the heart disease status and vessel count, alongside a legend for the color categories. Data is parsed from a CSV file, with stress levels converted from text to a numerical scale.