The latest advancements in wearable technology have opened up new possibilities for monitoring blood pressure. According to a Harvard Medical School expert, four key areas to focus on are wearable sensors, systems, signal processing and analysis procedures, and closed-loop systems. However, it's important to note that the Apple Watch alone cannot measure blood pressure, and users must link it to a compatible monitor. Additionally, a recent study found that the measurement of blood oxygen levels on the Apple Watch Series 6 did not meet medical standards.

Source: https://www.zdnet.com/article/best-blood-pressure-watch/