From the apple website on the ECG release.Things you should...

From the apple website on the ECG release.

Things you should know

• The ECG app cannot detect a heart attack. If you ever experience chest pain, pressure, tightness, or what you think is a heart attack, call emergency services immediately.
• The ECG app cannot detect blood clots or a stroke.

The ECG app cannot detect other heart-related conditions. These include high blood pressure, congestive heart failure, high cholesterol, or other forms of arrhythmia.
The last bullet point is the most important for the millions who have high-BP and related diseases, e.g. CKD, and are taking daily medications to regulate their health outcomes. These are the people that our FDA approved technology is targeting with its gold-standard, competition-free diagnostics.

We are the only FDA approved technology, and this gives me comfort, as we're about to release multiple health monitoring devices in 2021 - not long to wait.