Can smart devices detect arrhythmia or other heart defects?

You have several viable options, but the best would be a 12-lead ECG at a cardiac clinic or local ER, and then only when you're actually in an arrhythmia of some kind...which is sometimes tricky to get together.

There are Wellu and Oura rings, smart watches like Garmin, Samsung Galaxy (which I have worn for years now) and the Apple watches. There is also the Kardia Mobile device, a thin card that you can carry in a purse or shirt pocket, and you place two fingers on it, I think one from each hand, and let it read your rhythm. All do a reasonably good job.

He tenido hace 3 años fibrilación auricular cuyo malestar provocó una internación para hacer un estudio. Me medicaron y me dieron de alto y a los dos días tuve síntomas claros de covid. Nunca vamos a saber si fue una manifestación de covid y ahí quedó o un inicio de un problema permanente. Tuve durante este tiempo un seguimiento médico con análisis electrocardiogramas, Holster etcétera. Nunca se detectaron anormalidades Pero sigo con la meditación inicial que comencé cuando tuve los síntomas. Pero para mi tranquilidad desde hace un mes uso un reloj inteligente (Garmin,) lo que me da tranquilidad. Muestra permanentemente todas las variantes que sufre o que manifiesta mi corazón. Y quedan grabadas. En este tiempo todo lo que mostro ese control, es normal.
Me resulta práctico . Veo en el reloj y en el celular al cual está conectado permanentemente ,el funcionamiento o mejor dicho las manifestaciones del funcionamiento de mi corazón.

The most sensitive testing for episodic rhythms is a
small coin like device with adhesive placed over the
heart on your chest. It allows you to shower and go about your normal routine while in place for 3 to 4 weeks all the while continually monitoring and recording. You would need to consult a physician
for definitive testing. Some of the do it yourself devices
are able to detect atrial fibrillation and heart rate variability. Follow up with your doctor on these warnings symptoms.

It would be better if the doctor prescribed a heart monitor for you. It sticks on your chest, you go about your business for a few days, and it records everything. Then you mail it to the lab, and the doctor gets the full report of your heart activity.

En mí caso que explique anteriormente,el médico me hace permanentemente estudios,análisis,escaneo de arterias,Holster etc y ha dado todo bien. Pero sería riesgoso retirar toda la medicación y controles.No por ahora. El reloj ,por ahora es un control más.No estoy convencida de quitar la medicación aún a pesar de ser un problema y preocupación el estar permanentemente medicada Sobre todo por el anticualgulante.Ire paso a paso por este camino.El tiempo y los resultados determinarán que debo hacer.

They are called holter monitiors.
Super easy. Provider orders, 48 hrs to 30 days or however long provider wants. Way easy compared to old days

My Fitbit alerted me to my first AFIB event that began while I was sleeping. It showed upper and lower beats. I now have an Apple Watch. I am new to this smartwatch but see it’s AFIB warning is after the fact and showed level of AFIB for the week. It did pick up my sleep apnea however which is beyond Fitbit capability

I’m going to try the sleep a monitor feature on my Apple Watch. It does also monitor beat to beat heart rate variability as well. Mine show low variance related to
diminished autonomic control. Low variability is
found in Psoriatic arthritis. Amazing technology with
the watch and phone in tandem.