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Do I need a tilt table test to confirm a POTS diagnosis?
What is a tilt table test and what to expect if you will be undergoing testing.
 • 
Raquel Rodriguez, MD, MPP
Is the Apple Watch's oxygen sensor accurate?
A recent study showed similar accuracy to FDA-cleared devices, but the error bounds of even prescription pulse oximeters are probably wider than you'd…
 • 
Brandon Ballinger
 and 
Raquel Rodriguez, MD, MPP
August 2023
Sleep apnea and the link to cardiovascular health: what you need to know
What is sleep apnea, how it impacts cardiovascular health, and what you can do to improve your risk.
 • 
Raquel Rodriguez, MD, MPP
How far is 10,000 steps?
The science behind step counting, how many steps a day you need to stay healthy, and how you compare to the average American.
 • 
Raquel Rodriguez, MD, MPP
My Apple Watch says I have low blood oxygen while sleeping.
How to get checked for sleep apnea.
 • 
Raquel Rodriguez, MD, MPP
How do I get a POTS diagnosis?
What to expect when being evaluated for postural orthostatic tachycardia syndrome (POTS).
 • 
Raquel Rodriguez, MD, MPP
Why is it so hard to find a primary care doctor near me?
The value of primary care and the biggest challenge it faces.
 • 
Raquel Rodriguez, MD, MPP
July 2023
Empirical Health: proactive primary care that scales
Using AI, health sensors, virtual care, and value-based payment models to build the healthcare we would want for our own parents.
 • 
Brandon Ballinger
June 2023
What is HRV and what does it have to do with health?
The basics of heart rate variability and its connection to the autonomic nervous system.
 • 
Raquel Rodriguez, MD, MPP
May 2023
What can I do about my POTS? Part 2
At-home solutions for patients with postural orthostatic tachycardia syndrome.
 • 
Raquel Rodriguez, MD, MPP
What can I do about my POTS? Part 1
At-home solutions for patients with postural orthostatic tachycardia syndrome.
 • 
Raquel Rodriguez, MD, MPP
2
February 2023
The average Apple Watch user gets 49 minutes of deep sleep per night
How to interpret sleep stages data from your Apple Watch
 • 
Brandon Ballinger
1
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