SICK_SINUS
Technical documentation
Sick Sinus Syndrome (Bradycardia-Tachycardia)
Structural dysfunction of the sinus node combining episodes of profound sinus bradycardia, sinus pauses or arrest, and paroxysms of atrial tachyarrhythmias (frequently atrial fibrillation or flutter). Often accompanied by chronotropic incompetence and symptomatic pauses upon tachycardia termination.
Also known as: Sick Sinus Syndrome (Bradycardia-Tachycardia) · enfermedad del seno · sindrome del seno enfermo · disfuncion sinusal · disfuncion del nodo sinusal · sindrome bradicardia-taquicardia · sick sinus syndrome · SSS · ENS
What parameters does the model use?
The following values are applied by the simulation engine to this entity. They govern activation kinematics in the 3D model and the real-time synthesis of the 12-lead electrocardiogram.
What parameters does the model use?
| Parameter | Model value |
|---|---|
| Mechanism | Mixto |
| Impulse origin | Sinoatrial node (SA node) |
| Modeled rate | 35–150 bpm (default 70) |
| Regularity | Irregular |
| P wave | Multifocal (≥ 3 morphologies) |
| PR interval | 120–220 ms (default 170) |
| QRS duration | 90 ms |
| QRS morphology | Normal (narrow) |
| AV conduction | Variable |
| Severity | Clinically significant |
Which leads should be evaluated?
The catalog marks as primary diagnostic leads II. Alternation of rapid atrial tachyarrhythmia and prolonged sinus pauses on lead II.
In the simulator, these leads are highlighted on the 12-channel tracing and corresponding vectors are rendered on the 3D model, displaying electrical changes and anatomical origin simultaneously.
Frequently asked clinical questions
How is Sick Sinus Syndrome (Bradycardia-Tachycardia) identified on the 12-lead ECG?
Structural dysfunction of the sinus node combining episodes of profound sinus bradycardia, sinus pauses or arrest, and paroxysms of atrial tachyarrhythmias (frequently atrial fibrillation or flutter). Often accompanied by chronotropic incompetence and symptomatic pauses upon tachycardia termination. The characteristic diagnostic waveforms are generated in real time across the simulated 12-lead tracing.
Which leads are critical for diagnostic confirmation?
The primary diagnostic leads are II. Alternation of rapid atrial tachyarrhythmia and prolonged sinus pauses on lead II. In the simulator, these channels highlight the correlation with anatomical vectors.
What is the underlying electrophysiological or anatomical mechanism?
It originates from altered conduction in the SA_NODE, mediated by mixto.
How can this condition be explored in the 3D simulator?
MioAtlas offers direct deep-link reproducibility with preconfigured parameters, allowing full 3D cardiac rotation and lead vector inspection.
How do you open this configuration?
The simulator encodes its full state in the query string, providing a stable and reproducible URL:
https://mioatlas.com/simulador/en/?mode=conduction&arr=SICK_SINUS
Related entities
Other entities in the same category within the catalog:
Sources and bibliographic references
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Anderson RH, Yanni J, Boyett MR, Chandler NJ, Dobrzynski H (2009). "The anatomy of the cardiac conduction system". Clin Anat.
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Kligfield P, Gettes LS, Bailey JJ, et al. (2007). "Recommendations for the standardization and interpretation of the electrocardiogram: Part I: The electrocardiogram and its technology". Circulation.
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Rautaharju PM, Surawicz B, Gettes LS, et al. (2009). "AHA/ACCF/HRS recommendations for the standardization and interpretation of the electrocardiogram: Part IV: The ST segment, T and U waves, and the QT interval". Circulation.