Decrease of electrical cardiac systole

Breijo-Marquez, Francisco R.

doi:10.1016/j.ijcard.2007.12.051

Cited by 12 publications

(21 citation statements)

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“…For some authors, the electrical cardiac systole comprises only the QT interval (ventricular cycle) [11], but we think that the depolarization atrial must be included [1,2,10] Electrical cardiac systole comprises…”

Section: Discussionmentioning

confidence: 99%

Shortening of Electrical Cardiac Systole: A New Electrical Disturbance? Short PR and QT Intervals in the Same Electrocardiogram Tracing (Breijo Pattern)

Marquez¹

2014

JCCR

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and repolarization (complete ventricular cycle); its length must be between 0.400 and 0.450 seconds (depending of authors and their conveniences, these values may vary; for us and with a broader context, the normal QTc values are between 0.400 and 0.450 seconds in length). There are many formulas to measure the value of these lengths; the most used are Bazett and Fridericia yet.• Like the R-R interval, the QT interval is dependent on the heart rate in an obvious way (the faster the heart rate the shorter the R-R Interval and QT interval) and may be adjusted to improve the detection of patients at increased risk of ventricular arrhythmia.There are several correction formulas. The standard clinical correction is to use Bazett's formula and Fridericia's formula, calculating the heart rate-corrected QT interval: QTc. The author and his collaborators published a shortening of PR-interval (< 0.12 seconds) alongside a shortening of the QTinterval (< 0.400 seconds) on the same ECG tracing on 2008. We will present in this writing the presence of this pattern, some authors call it Breijo pattern, either alone or associated with other heart pathologies such as Wellens syndrome (or Wellenspattern). Shortening of the P-R and Q-T Intervals in the Same Electrocardiographic Tracing. (Breijo Pattern)In 2008, Breijo-Marquez and colleagues published an electrocardiographic tracing in which both features could be seen. The PR interval was lower than 0.120 seconds and the corrected QT interval was lower than 0.350 seconds. They called it "Decrease of electrical cardiac systole". [1]; also has been entitled as "Accelerated atrioventricular stimulation with an early and shortened ventricular repolarization in the same individual" [2].People who had this kind of electrocardiographic pattern, had also suffered from a wide variety of symptoms. Nocturnal tachycardias, dizziness, seizures, and unexplained syncopal accesses were the main symptoms common to all patients. Were diagnosed as epileptics and treated with specific drugs for epilepsy all patients; the results with such treatment were null.However, the electroencephalographic registers did not provide any visualization for epileptogenic focus in any of assessed patients. The patient age ranged from 16 to 40 years. The male gender was predominant. All previous electrocardiographic studies were considered within normal ranges.A plentiful study with specific tests for the heart was done at our hospital: Blood Analysis (with electrolytes); Electrocardiography; Holter study; Stress test (Bruce protocol), Echocardiography, EEF, Angiography, and SPECT were done with informed consent of both patient and hospital. Blood Test• Calcium, Chlorine, Magnesium, Phosphorus, Potassium, Sodium, CK-MB, LDH (1.2), CPK, Troponins (nIc, nTc) were assessed.• We also added determinations of blood levels of lithium.• All parameters analyzed were within normal ranges except Lithemy.• All patients had very low levels of lithium in blood (100%), with lower values than 0.1 mEq / l.• Stress test (Bruce protoco...

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Section: Discussionmentioning

confidence: 99%

Shortening of Electrical Cardiac Systole: A New Electrical Disturbance? Short PR and QT Intervals in the Same Electrocardiogram Tracing (Breijo Pattern)

Marquez¹

2014

JCCR

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“…We also think it is worthy to mention an interesting paradoxical ECG phenomenon called deceleration-dependent shortening of QT interval (shortening of QT interval associated with a decrease in heart rate); this should also be considered in a differential diagnosis [1][2][3].…”

Section: Genotype Positivementioning

confidence: 99%

“…In 2008, Breijo-Marquez et al [1][2][3] presented an electrocardiographic pattern, in which both the PR and QT intervals were shorter in milliseconds than what is regarded as acceptable limits.…”

Section: Introductionmentioning

confidence: 99%

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Breijo Electrocardiographic Pattern

Breijo-Marquez¹

2018

Cardiac Arrhythmias

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“…Treatment outcomes were null. They were always considered as normal, in every cardiac studies performed absolutely [Breijo-Marquez, FR., 2008].…”

Section: Short Pr-interval Alongside Short Qt-interval On the Same Pementioning

confidence: 99%

The Variations in Electrical Cardiac Systole and Its Impact on Sudden Cardiac Death

Breijo-Marquez¹,

Ríos²

2012

Cardiac Arrhythmias - New Considerations

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Decrease of electrical cardiac systole

Cited by 12 publications

References 0 publications

Shortening of Electrical Cardiac Systole: A New Electrical Disturbance? Short PR and QT Intervals in the Same Electrocardiogram Tracing (Breijo Pattern)

Shortening of Electrical Cardiac Systole: A New Electrical Disturbance? Short PR and QT Intervals in the Same Electrocardiogram Tracing (Breijo Pattern)

Breijo Electrocardiographic Pattern

The Variations in Electrical Cardiac Systole and Its Impact on Sudden Cardiac Death

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