The heart always speaks. But who listens?

Cardiovascular disease remains the world's leading cause of death. But the heart often shows signals before a crisis becomes visible. We are building to help listen earlier, longer, and more clearly.

Clarity for patientsbuilt with clinical discipline.

DiagnAll brings together biomedical engineering, artificial intelligence, and clinical thinking to make long-term heart monitoring easier to understand and easier to act on. Our goal is not to replace clinicians, but to support them with clearer signals, better context, and more continuous data.

Who we are

DiagnAll is a health-tech team building AI-assisted tools for continuous cardiac monitoring. We combine biomedical engineering, ECG signal analysis, and product design to help transform heart data into useful insight for patients and clinicians.

Why it matters

Heart-related risk is often difficult to capture in a single appointment or short recording. More continuous monitoring can help reveal patterns that might otherwise be missed between clinical visits.

Our approach

We focus on discreet wearable sensing, careful AI analysis, and clinically responsible workflows. Cardion is designed to support awareness and review, not to create noise, panic, or unsupported medical claims.

Cardioncontinuous insight, calmer care.

Cardion is a wearable ECG patch and AI-assisted platform designed to record heart signals continuously, highlight concerning patterns, and help healthcare professionals review cardiac activity with better context over time.

Comfortable monitoring image

Comfortable monitoring

Designed for everyday use, Cardion aims to support longer monitoring periods without disrupting work, rest, movement, or daily routines.

High-quality heart signals image

High-quality heart signals

Cardion focuses on reliable ECG signal capture from a compact wearable form, helping create cleaner timelines for review and follow-up.

AI-assisted insight image

AI-assisted insight

AI models analyze ECG patterns and flag segments that may need attention, supporting faster review while keeping clinical judgment at the center.

Teamclinical, technical, human.

We are a multidisciplinary team working across engineering, AI, biomedical signals, product development, and healthcare communication. What connects us is a simple belief: heart monitoring should be more continuous, more understandable, and more human.

Alexandra Sachinidi

Alexandra Sachinidi

Co-Founder & CPO

Iakovos Sachinidis

Iakovos Sachinidis

Co-Founder

Nikos Vardonikolakis

Nikos Vardonikolakis

Co-Founder & CEO

Gerasimos Pnevmatikakis

Gerasimos Pnevmatikakis

Co-Founder & CTO

Milestones

Scroll to explore our progress from concept to validation.

Long-window monitoring concept

Milestone 01

Long-window monitoring concept

We are developing Cardion around the need for longer, more continuous ECG monitoring outside the hospital, helping reduce the gaps between isolated clinical checks.

AI proof of concept

Milestone 02

AI proof of concept

Our early AI work uses real clinical ECG data to explore how machine learning can support recognition of concerning cardiac patterns and assist future review workflows.

Wearable product direction

Milestone 03

Wearable product direction

The Cardion concept is built around a discreet ECG patch designed for everyday wear, with comfort treated as an essential part of long-term monitoring.

Ecosystem validation

Milestone 04

Ecosystem validation

Through innovation programs, mentors, clinicians, and startup competitions, we are testing the need, refining the product direction, and preparing for the next validation steps.

Progress you can seemilestones toward safer heart monitoring.

Cardion is still under development, but our work is already moving from research and proof of concept toward product design, validation planning, and clinical collaboration.

  • 1st Place — Ideathon Patras by Piraeus Bank & POS4WORK image

    May 2025

    1st Place — Ideathon Patras by Piraeus Bank & POS4WORK

  • Selected for Piraeus Startup Accelerator image

    July 2025

    Selected for Piraeus Startup Accelerator

  • Orange Grove alumni image

    November 2025

    Orange Grove alumni

  • 1st Place — Startup Universe Greece 2025 image

    December 2025

    1st Place — Startup Universe Greece 2025

  • Participant in Lab to Market by Columbia University & NTUA image

    January 2026

    Participant in Lab to Market by Columbia University & NTUA

We're here to listenreach out.

Whether you are a clinician, researcher, patient, mentor, investor, or future team member, we would be glad to hear from you. Reach out for collaborations, feedback, or questions that doesn't cover.