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"Sinus node" reentrant tachycardia associated with respiration
Takakazu Katoh1, Shinji Kinoshita, Yoshinori Tsujimura
1Katoh Cardiovascular Clinic, Ohtsu, Japan.
Journal of Electrocardiology
|October 24, 2002
Summary
Two women experienced paroxysmal sinus tachycardia linked to breathing. The study suggests sinus node reentrant tachycardia as a potential mechanism for these unique respiratory-associated heart rhythm disturbances.
Area of Science:
- Cardiology
- Electrophysiology
- Internal Medicine
Background:
- Paroxysmal sinus tachycardia can be influenced by physiological factors.
- Understanding the mechanisms of tachyarrhythmias is crucial for effective treatment.
Observation:
- Two cases of paroxysmal sinus tachycardia associated with respiration are presented.
- Tachycardia initiation and termination correlated with respiratory phases (inspiration/expiration).
- Reentrant P' waves resembled sinus P waves in configuration and timing.
Findings:
- Case 1 showed tachycardia initiation during inspiration and termination during expiration (tachycardia-dependent).
- Case 2 exhibited initiation during expiration and termination during inspiration (bradycardia-dependent).
- Sinus node reentrant tachycardia is proposed as a potential mechanism for these findings.
Implications:
- These cases highlight unique respiratory influences on sinus tachycardia.
- Further electrophysiologic studies may clarify the precise mechanisms of these arrhythmias.
- Recognition of respiration-associated tachycardia can aid in diagnosis and management.