Garmin Venu 4

The Garmin Venu 4 represents a significant evolution in the Venu series, firmly establishing Garmin as a medical-grade health monitor for the general consumer. Its cornerstone feature is the FDA-cleared ECG App, which allows users to capture a single-lead (Lead I) ECG by touching the bezel for 30 seconds. Clinical validation in a study of approximately 590 subjects demonstrated that the algorithm correctly identifies AFib 99.5% of the time and maintains 100% specificity for sinus rhythm in classifiable recordings. Beyond spot-checks, the Venu 4 includes an Irregular Heart Rhythm Notification (IHRN) feature that passively monitors pulse intervals via the PPG sensor to detect potential undiagnosed AFib. The device also tracks SpO2, skin temperature variations, and advanced HRV (Heart Rate Variability) metrics through its 'Health Snapshot' feature. With a 3000-nit AMOLED display and a 3nm processor, it offers high-resolution data visualization without sacrificing its industry-leading 12-day battery life. While it lacks the dedicated sleep apnea clearance found in the Samsung Galaxy Watch 8, its integrated 'Body Battery' and 'Training Readiness' scores provide a more holistic view of physical recovery and cardiac strain than most lifestyle-focused wearables.