Daily Variations in the Occurrence of Symptomatic Supraventricular Tachycardia as Determined by Ambulatory Event Monitoring

Porterfield, James G.; Porterfield, Linda M.; Nestor, James R.

doi:10.1016/s0002-9149(97)00541-9

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…The exclusive nocturnal nature of the rhythm disturbances in these patients contrasts with the more common pattern of rhythm disturbances in patients with cardiac disease, where rhythm disturbances are less frequent during sleep than during wakefulness. 21 An interesting finding of the present study is that severity of OSA was greater in patients with rhythm disturbances compared with those without ( Table 3). This finding contrasts with other reports that have failed to show a relationship between the presence of rhythm disturbances and severity of OSA.…”

Section: Discussionsupporting

confidence: 54%

See 1 more Smart Citation

Cardiac Rhythm Disturbances in the Obstructive Sleep Apnea Syndrome

Harbison¹,

O’Reilly²,

McNicholas³

2000

Chest

216

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Section: Discussionsupporting

confidence: 54%

“…Previous reports have indicated that cardiac rhythm disturbances are generally more frequent during waking hours. 21 All of the above considerations strongly support the view that the cardiac rhythm disturbances observed were a consequence of the patients' OSAS.…”

Section: Discussionsupporting

confidence: 52%

Cardiac Rhythm Disturbances in the Obstructive Sleep Apnea Syndrome

Harbison¹,

O’Reilly²,

McNicholas³

2000

Chest

216

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“…(Chronobiology International, 19(4), [785][786][787][788][789][790][791]2002) INTRODUCTION Several studies identify 24h patterns in hyperkinetic cardiac arrhythmias. In this regard, well-defined circadian variability has been reported in atrial fibrillation, [1 -3] supraventricular tachycardia, [4,5] and ventricular arrhythmias. [6 -8] We know of only one published report of cyclic activity in complete heart block; [9] the young female subject of this study displayed a greater number of such cyclic activity during the day than night.…”

mentioning

confidence: 99%

Morning Preference in Onset of Symptomatic Third-Degree Atrio-Ventricular Heart Block

Manfredini

Gallerani

Boari

et al. 2002

Chronobiology International

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The aim of this study was to examine 24h patterning in the symptoms indicative of third-degree atrio-ventricular (AV) heart block. We found a total of 227 cases (126 men and 101 women) of third-degree AV block that had been diagnosed by the Emergency Medical Department of the St. Anna Hospital in Ferrara, Italy between 1990 and 2001. Determination of the hour of onset of symptomatic third-degree AV block, however, was possible and listed in the records of only 161 or 70.9% of the cases (92 men and 69 women). The onset time of every event was categorized into one of four 6h spans of the 24h: night (00:00-05:59h), morning (06:00-11:59h), afternoon (12:00-17:59h), and evening (18:00-23:59h). The onset of the symptoms of third-degree AV block in the sample of 161 cases was significantly greater in the morning between 06:00 and 11:59h than any other 6h span of the day and night (chi2-test; p < 0.001). The same phenomenon was substantiated in the subgroup of the 92 males (chi2; p < 0.0001), although it could not be detected for the smaller subgroup of 69 women. The 24h pattern, with morning preference, in the onset of symptomatic third-degree AV block is similar to the one in sudden cardiac death and cardiogenic cardiac arrest. The etiology of the 24h pattern in symptomatic AV block is unknown; it may be an expression of intrinsic biological rhythmicity within the heart tissue or its control system, and/or the timing of environmental triggers resulting in coronary ischemia.

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