1. Clinical Use of Class I and III Anti-arrhythmic Drugs. Kor Soc of Circulation. Busan Bexco. April 18, 2008.

2. The Management of Arrhythmias and Practical Utilization of Anticoagulation in Old Generations. Kor Soc of Clin Geriatrics. Ewha Univ. April 12, 2008.

3. Roles of Purkinje System in the Maintenance of Ventricular Fibrillation. Basic Electrophysiology Review Course. Korea Univ. Hospital. Feb 16, 2008.

4. Electrocardiographic Informations from ST-T waves. Busan-Kyungnam ECG Conference. Ko-Shin Univ. Jan 26. 2008

5. Narrow QRS Tachycardia. Electrocardiography Symposium. Dae-Gu Kyemyong Univ. Dec. 09, 2007

6. Management of Ventricular Arrhythmia in Patients with Coronary Artery Disease. Acute Coronary Syndrome Symposium. Ewha Univ. Dec. 02, 2007

7. The Evaluation of Syncope. Critical Care Cardiology; Seoul Samsung Hospital. Nov. 24, 2007.

8. The limitations and Future Directions in Cardiac Cell Therapy. Stem Cell Research Group Workshop. Seoul Natl Univ. Sep 21, 2007.

9. Narrow QRS Tachycardia. SNUH ECG Review Course. Seoul Natl Univ. Sep 01, 2007.

10. Mechanism and electrocardiographic findings of paroxysmal supra ventricular tachycardia. Electrophysiology Allied Person CME Course. Jul 14, 2007.

11. New concepts of arrhythmia in clinical practice. Family Medicine CME Course. May 20, 2007.

12. Catheter Ablation of Chronic Atrial Fibrillation: Linear Ablation or Electrogram Guided Ablation? Korean Society of Circulation. April 20. 2007.

13. Evaluation of Narrow QRS Tachycardias. Cardiology Update. Ulsan Univ. Mar 11. 2007.

14. ECG Characteristics of Paroxysmal Supraventricular Tachycardias. Busan-Kyungnam ECG Conference. Ko-Shin Univ. Jan 20. 2007.

15. Differential diagnosis of wide QRS rhythm. Electrocardiography Symposium. Dae-Gu Kyemyong Univ. Dec. 2006

16. Electrophysiologic emengencies in patients with cardiac ciritical care: case based study. Critical Care Cardiology; Seoul Samsung Hospital. Nov. 2006.

17. Diagnosis and management of common arrhythmias. Korean Geriatrics Society. Nov. 2006.

18. Do we have to treat every patients with atrial fibrillation: so common disease? Korean Society of Family Medicine. April 2006.

19. The roles of primary care physician in management of arrhythmia. Family Doctors’ Association. March 2006

20. Management of intractable ventricular tachyarrhythmia. Critical Care Cardiology; Seoul Samsung Hospital. Nov. 2005.

21. Catheter ablation of chronic atrial fibrillation in patients with heart failure. Clinical Cardiology Symposium; Jeon-Nam Univercity. Feb. 2005.

22. Mapping and ablation of ventricular fibrillation : Bench to Bedside. Korean Society of Circulation. Oct. 2004.

23. Diagnosis and treatment of rhythm disorder. Association of Medical Insurance Reviewers. Sep. 2004.

24. Interpretation of complex electrocardiogram at the bed-side. Medical Association in Seungbuk Ward. June. 2004.

25. Mesenchymal stem cell transplantation and cardiac nerve sprouting. Artifical Organ Center, Korea University. June. 2004.

26. Defibrillation: Special lecture to intern. Korea University Medical Center. May. 2004.

27. Interpretation of complex electrocardiogram. Medical Association in Ansan City. Oct. 2003.

28. Mechanism of arrhythmia and anti-arrhythmic drugs. Kwan-dong University Medical School. Mar. 2003.