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Structural Skin Capillary Rarefaction in Essential Hypertension

Hypertension (Dallas, Tex. 1979), 1999-04, Vol.33 (4), p.998-1001 [Peer Reviewed Journal]

1999 American Heart Association, Inc. ;1999 INIST-CNRS ;ISSN: 0194-911X ;EISSN: 1524-4563 ;DOI: 10.1161/01.hyp.33.4.998 ;PMID: 10205237 ;CODEN: HPRTDN

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Title:
Structural Skin Capillary Rarefaction in Essential Hypertension
Author: Antonios, Tarek F.T ; Singer, Donald R.J ; Markandu, Nirmala D ; Mortimer, Peter S ; MacGregor, Graham A
Subjects: Adult ; Aged ; Arterial hypertension. Arterial hypotension ; Biological and medical sciences ; Blood and lymphatic vessels ; Capillaries - pathology ; Cardiology. Vascular system ; Clinical manifestations. Epidemiology. Investigative techniques. Etiology ; Female ; Humans ; Hypertension - etiology ; Hypertension - pathology ; Hypertension - physiopathology ; Male ; Medical sciences ; Middle Aged ; Neovascularization, Physiologic ; Skin - blood supply ; Vascular Resistance
Is Part Of: Hypertension (Dallas, Tex. 1979), 1999-04, Vol.33 (4), p.998-1001
Description: A reduction in the density of capillaries (rarefaction) is known to occur in many tissues in patients with essential hypertension. This rarefaction may play a role in increasing peripheral resistance. However, the mechanism underlying this capillary rarefaction is not understood. The aim of this study was to assess the extent of structural versus functional capillary rarefaction in the skin of dorsum of fingers in essential hypertension. The capillary microcirculation was examined with video microscopy before and after maximizing the number of perfused capillaries by venous congestion. The study group comprised 17 patients with essential hypertension (mean supine blood pressure, 155/96 mm Hg) and 17 closely matched normotensive controls (mean blood pressure, 127/77 mm Hg). We used intravital video microscopy with an epi-illuminated microscope to examine the skin of the dorsum of left middle phalanx before and after venous congestion at 60 mm Hg for 2 minutes. A significantly lower mean capillary density occurred at baseline in hypertensive subjects versus normotensive subjects. With venous occlusion, capillary density increased significantly in both groups; however, maximal capillary density remained significantly lower in the hypertensive subjects than in the normotensive subjects. The study strongly suggests that much of the reduction in capillary density in the hypertensive subjects is caused by structural (anatomic) absence of capillaries rather than functional nonperfusion. (Hypertension. 1999;33:998-1001.)
Publisher: Philadelphia, PA: American Heart Association, Inc
Language: English
Identifier: ISSN: 0194-911X
EISSN: 1524-4563
DOI: 10.1161/01.hyp.33.4.998
PMID: 10205237
CODEN: HPRTDN
Source: Geneva Foundation Free Medical Journals at publisher websites
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Structural Skin Capillary Rarefaction in Essential Hypertension

1999 American Heart Association, Inc. ;1999 INIST-CNRS ;ISSN: 0194-911X ;EISSN: 1524-4563 ;DOI: 10.1161/01.hyp.33.4.998 ;PMID: 10205237 ;CODEN: HPRTDN

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