Heart to Voice (H2V) is a first-of-its-kind voice-based AI monitoring solution that detects heart failure worsening from a minimum of 10 seconds of speech. Heart to Voice (H2V) consolidates nine clinical heart failure indicators into a unified Heart Failure Composite Score, estimating clinically defined heart failure status directly from voice. Heart failure patients frequently deteriorate between hospital visits, driving repeated readmissions, high mortality, and missed opportunities for timely intervention. Existing monitoring approaches rely on wearable devices, dedicated sensors, or indirect physiological measurements that are difficult to use consistently—particularly for older adults. By tracking personalized changes over time, Heart to Voice (H2V) enables earlier identification of worsening and provides interpretable health information and actionable care guidance. Heart to Voice (H2V) aims to make heart failure monitoring more accessible and scalable, supporting proactive disease management beyond traditional healthcare settings.