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Praxis Onk

General Practice and Cardiology

Here for you at two locations

Our practice in Höri and Embrach combines primary care and cardiological expertise. We support you reliably – from the initial assessment to advanced diagnostics and follow-up.

Online Booking

Create your appointment in minutes with same‑day availability.

Modern Technology

Accurate diagnostics with Echo, ECG and Holter.

Professional Team

Experienced specialists and friendly staff for safe care.

Cardionk diagnostic preview

About Us

CardiOnk: Safe, Your Heart First

CardiOnk provides comprehensive and personalised care with evidence‑based approaches, advanced diagnostics and an experienced team.

Our Vision

Non‑invasive advanced diagnostics, accessible appointments and transparent communication.

Our Mission

Personalised follow‑up with online booking and ECG/Echo/Holter capabilities.

OUR COMMITMENT

Dedicated to Excellence with a Trusted Approach

Our goal is to improve quality of life with accurate diagnosis, clear communication and personalised follow‑up. We embrace a technology‑supported and transparent model.

  • Patient Safety
  • Evidence‑Based
  • Advanced Diagnostics
  • Continuous Follow‑Up
  • Transparent Communication
  • Fast Online Booking

OUR SERVICES

Comprehensive Cardiology Solutions

Evidence‑based diagnostics and follow‑up tailored to your needs.

Cardiology Examination

Expert evaluation and personalised treatment plan.

ECG

Rapid assessment of rhythm and conduction disorders.

Echocardiography (Echo)

Detailed analysis of structures and function with ultrasound.

Rhythm Holter

24–48h rhythm monitoring for intermittent palpitations.

Ambulatory BP (ABPM)

24h blood pressure profile for accurate hypertension management.

Exercise Test (Stress ECG)

Assess performance and ischaemia risk under stress.

OUR DEVICES

Modern and Reliable Diagnostic Solutions

We use advanced, high‑accuracy systems for diagnostics and follow‑up.

SOMNOmedics SOMNOtouch RESP
SOMNOmedics

SOMNOtouch RESP

Sleep Apnea / Respiratory Polygraphy

CardioSecur CardioSecur Pro 22
CardioSecur

CardioSecur Pro 22

Mobile 22‑lead ECG

Philips CX50 xMATRIX
Philips

CX50 xMATRIX

Echocardiography / Ultrasound

Medset ABPM
Medset

ABPM

Ambulatory BP Monitoring (ABPM)

OUR TEAM

Meet Our Experienced Team

CardiOnk provides care with experienced cardiology and internal medicine physicians and a strong management team.

Dr.med.(TR) Serafettin Onk

Dr.med.(TR) Serafettin Onk

Cardiology Specialist

Dr.med.(TR) Erkan Tuğral

Dr.med.(TR) Erkan Tuğral

General Practitioner

Drs.(NL) Ahmad Khan Ashar

Drs.(NL) Ahmad Khan Ashar

Internal Medicine Specialist

Nalan Daniela Sönmez Onk

Nalan Daniela Sönmez Onk

Practice Management (Ass.jur.)

HOW IT WORKS

At CardiOnk the Process is Clear

From booking to follow‑up, we stand by you with clear communication and evidence‑based care.

01

Book

Choose a suitable time online or call 044 861 10 04.

02

Consultation

Specialist listens, examines and sets an appropriate plan.

03

Diagnostics & Care

Accurate diagnosis with ECG, Echo, Holter and additional tests if needed.

04

Follow‑up

Regular controls and remote communication to track your progress.

PATIENT TESTIMONIALS

Hear From Those Who Trust CardiOnk

Experiences from examinations, diagnostics and follow‑up.

Ayşe Y.

Zürich

I visited for palpitations. Examination and Holter clarified the issue quickly. Explanations were clear; I felt safe throughout the process.

★★★★★
Mehmet K.

Embrach

Echo and ECG were very thorough. My plan was clearly explained and follow‑ups were regular.

★★★★★
Lara S.

Höri

Booking was fast. The professional approach eased my concerns and I felt well cared for.

★★★★★

BLOG & NEWS

Latest Articles in Cardiology

Clinic updates, heart‑health tips and diagnostic insights.