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Pulse regulation involves physiological mechanisms that ensure adequate blood flow throughout the body. The heartbeat, regulated by the autonomic nervous system, is influenced by hormonal balance, physical activity, and emotional state.
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Tachycardia is a condition marked by an abnormally fast or irregular heart rate, surpassing the typical resting rate. In adults, tachycardia is characterized by a pulse rate ranging from 100 to 180 beats per minute. The increased heart rate can result in inadequate blood flow to various body parts, ultimately diminishing the oxygen supply to organs and tissues.
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Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
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Pulse rhythm01:30

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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
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Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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Dysrhythmias VI: Management of Dysrhythmias01:25

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Video Experimental Relacionado

Updated: May 5, 2026

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
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El ritmo como tratamiento para la hipersensibilidad por reflejo (vasovagal, situacional o del seno carotídeo)

Paul D Varosy, Lin Y Chen, Amy L Miller

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    Resumen

    El ritmo puede reducir el síncope recurrente en pacientes con síncope mediada por reflejos, pero la evidencia es limitada. Sólo los pacientes con asistolia documentada se benefician del pacing, en particular aquellos con síncope vasovagal.

    Palabras clave:
    Declaraciones científicas de la AHAComité de revisión de las pruebasel marcapasosel ritmoSincopio reflejoSincopiodiagnóstico de síncopeSincopio vasovagal

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    Área de la Ciencia:

    • Cardiología
    • Electrofisiología Clínica
    • Revisión sistemática y metaanálisis

    Sus antecedentes:

    • El síncope mediado por reflejo es una condición común con un impacto significativo en la calidad de vida.
    • El ritmo ha sido explorado como un tratamiento potencial para reducir la recurrencia de síncope.
    • La evidencia con respecto a la eficacia del pacing para el síncope mediado por reflejos sigue siendo objeto de debate.

    Objetivo del estudio:

    • Revisar sistemáticamente la literatura biomédica para evaluar la eficacia del ritmo cardíaco en la reducción del síncope recurrente.
    • Evaluar el impacto del ritmo en los resultados clínicos relevantes en pacientes adultos con síncope mediada por reflejos.

    Principales métodos:

    • Revisión sistemática de ensayos aleatorizados y estudios observacionales de MEDLINE, EMBASE y el Registro Central de Cochrane.
    • Los criterios de inclusión se centraron en los estudios que examinaron el ritmo para el síncope en pacientes adultos.
    • Se evaluó la calidad de los estudios y se extrajeron datos sobre los resultados relevantes.

    Principales resultados:

    • Diez estudios (9 ensayos aleatorizados, 1 estudio observacional) en los que participaron 676 pacientes cumplieron con los criterios de inclusión.
    • Los estudios abiertos mostraron una reducción del 70% en síncope recurrente con estimulación (RR: 0,30; IC del 95%: 0,15- 0,60).
    • Los estudios doble ciego no mostraron un beneficio claro (RR: 0,73; IC del 95%: 0,25 - 2,1), con amplios intervalos de confianza. El ensayo ISSUE-3 mostró un beneficio en pacientes con asistolia documentada.

    Conclusiones:

    • Existen datos limitados, con el potencial de sesgo en la determinación de los resultados.
    • Sólo se identificaron dos estudios doble ciego.
    • El ritmo no es compatible con el síncope mediado por reflejo, excepto en pacientes con síncope vasovagal recurrente y asistolia documentada.