Heart Sound Wave Illustration

Design a striking vector-style illustration of a heart with a sound wave emanating from it. The heart should have a slight gradient effect, transitioning from deep red to a lighter hue for depth. The sound wave should be sleek and modern, forming a rhythmic pattern. The text 'Listen to Your Heart' should be displayed in an elegant, bold font, with a subtitle 'Heart Health Matters' in a refined serif font. Use a color palette of crimson red and navy blue to create contrast. The design should be isolated on a crisp white background in vector style.