Original articleClinicalHeart Rate and Arrhythmia in Patients with Psoriasis Vulgaris
Introduction
Psoriasis is one of the most prevalent T-cell-mediated chronic inflammatory diseases affecting around 1–3% of human population worldwide (1). Despite quite considerable advances in the last years, its pathogenesis is still not fully elucidated; however, inflammatory processes and oxidative stress are among those most frequently delineated (2). There is a clear genetic component with multifactorial inheritance and interactions between genetic predisposition and the environmental factors observed in the majority of patients 3, 4.
Psoriasis is characterized by hyperproliferation and distorted differentiation of epidermal keratinocytes, lymphocytic infiltration, predominantly composed of T lymphocytes, endothelial vascular abnormalities in the dermis including angiogenesis, dilatation and excessive endothelial venule formation (5). T lymphocytes with neutrophils, natural killer cells, endothelial cells, mast cells, fibroblasts and mediators released are regarded as important factors in psoriatic lesion development and maintenance (6). It is widely accepted that Th1 cytokines, i.e., tumor necrosis factor alpha (TNF-α), interferon gamma (IFN-γ) and interleukin 2 (IL-2) are key factors in psoriasis 4, 7. Th1-type cytokines lead to release of cytokines from other cells, producing a virtual cascade of mediators that effect development of psoriatic lesions. 4, 8, 9, 10, 11.
Data in the literature point to cardiovascular abnormalities in the course of this disease. The following conditions are most frequently observed: arterial hypertension, arterial atherosclerosis, and heart valve abnormalities 12, 13, 14, 15, 16, 17.
Virtually, there is scarcity of data on heart rate abnormalities, heart rate variability, and conduction disturbances in psoriatic patients, despite a quite clear connection between arrhythmia occurrence and chronic inflammatory processes 18, 19.
The aim of the study was to evaluate heart rate variability and arrhythmia in patients with long-lasting psoriasis.
Section snippets
Patients
The study comprised 32 patients (17 females, 15 males; aged 26–65 years, mean ± SD: 48 ± 11) with chronic psoriasis vulgaris hospitalized at the Department of Dermatology, Medical University of Łódź because of exacerbation of psoriasis. Disease duration ranged from 1–37 years (mean ± SD: 17 ± 10.7 years). Severity of the disease was evaluated by Psoriasis Area and Severity Index (PASI), which ranges from 0–72 points. Extension of skin lesions situated on the head, trunk, upper and lower limbs
Results
Heart rate was significantly higher, both during the day and at night, in patients with psoriasis vulgaris (mean ± SD: 88 ± 8 beats/min and 71 ± 7 beats/min, respectively) (Figure 1, Figure 2) than in the control group (mean ± SD: 73 ± 6 beats/min and 63 ± 4 beats/min, respectively) (both p <0.0001) (Figure 3, Figure 4). We did not observe any statistically significant differences in the time domain HRV. Measured values were (mean ± SD): SDNN: 128 ± 28 msec and 131 ± 35 msec, rMSSD: 26 ± 13
Discussion
The examined group of psoriatic patients did not report any cardiovascular symptoms, were not under cardiologic follow-up and were not on any cardiologic drugs. None of the examined patients demonstrated any abnormalities in heart rate based on routinely performed ECG examination. Predisposition to sinusal tachycardia and more frequent occurrence of supraventricular beats in psoriatic patients were demonstrated only by Holter 24-h ECG monitoring.
There are scarce data in the literature on
Acknowledgments
This work was supported by grants from the Medical University of Lodz (no. 503-1019-1 and 502-11-353).
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