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Updated: Jun 23, 2026

Non-invasive Assessment of Microvascular and Endothelial Function
Published on: January 29, 2013
Interrelation of cardiac and vascular structure in young men with borderline hypertension
A Bergbrant1, L Hansson, S Jern
1Department of Medicine, Ostra Hospital, University of Göteborg, Sweden.
Insights
Cardiovascular changes like left ventricular hypertrophy and vascular remodeling occur early in borderline hypertension. These changes develop in parallel and are not solely driven by blood pressure levels, suggesting other factors are involved.
Area of Science:
- Cardiovascular Physiology
- Hypertension Research
- Vascular Biology
Background:
- The relationship between left ventricular hypertrophy (LVH) and structural vascular changes in relation to elevated blood pressure (BP) remains unclear.
- It is debated whether these cardiovascular alterations are primary or secondary to hypertension.
Purpose of the Study:
- To investigate the interplay between left ventricular mass (LVM) and minimal vascular resistance (Rmin) in borderline hypertensive (BH) men.
- To determine if cardiovascular changes are primary or secondary to BP elevation in early hypertension.
Main Methods:
- Studied 54 borderline hypertensive men and 20 normotensive controls (aged 20 years).
- Measured LVM via echocardiography, Rmin from calf and forearm blood flow, and central hemodynamics using intra-arterial BP recordings and dye dilution.
- Classified BH individuals into normokinetic (NBH) and hyperkinetic (HBH) subgroups.
Main Results:
- LVM and Rmin correlated with body size but only weakly with BP in BH men.
- NBH subgroup showed significantly higher Rmin, indicating structural vascular changes.
- Significant correlation between LVM and Rmin in NBH, persisting after body size correction, but not in HBH or normotensive controls.
Conclusions:
- Cardiovascular changes and structural remodeling appear early in borderline hypertension.
- Cardiac and vascular adaptations develop in parallel.
- Factors beyond elevated blood pressure significantly influence structural adaptation in mildly hypertensive states.
Abstract:
It is not established whether left ventricular hypertrophy and structural vascular changes are primary phenomena or secondary consequences of raised blood pressure. In this study we investigated 54 borderline hypertensive men (BH) (SBP 140-160 mmHg and/or DBP 84-95 mmHg) and 20 normotensive men (NC) (SBP 110-130 mmHg and DBP 60-80 mmHg), recruited from an unbiased population sample (age 20 +/- 2 years). Blood pressure (BP) levels were confirmed by i.a. BP recordings. Left ventricular mass (LVM) was determined with M-mode echocardiography and minimal vascular resistance (Rmin) was calculated from the blood flow in the calf and forearm after maximal ischaemic work. Central haemodynamics were assessed by intra-arterial blood pressure recordings and cardiac output determinations by the dye dilution technique. In the BH group, LVM and Rmin were strongly correlated to body size, especially weight and body surface area. However, LVM and Rmin were only weakly correlated to blood pressure. In the normokinetic BH subgroup (NBH) (n = 38) minimal forearm vascular resistance was significantly higher than in the hyperkinetic BH individuals (HBH) (n = 16), indicating the presence of structural vascular changes in the former. Furthermore, in the NBH group there was a significant correlation between LVM and Rmin both in the calf (r = 0.490 P = 0.002) and in the forearm (r = 0.520 P = 0.001). This association remained after correction for body size. No such correlation was seen in the HBH subgroup or in the NC group. The present study does give long-reaching conclusions as regards the aetiological factors underlying the cardiovascular remodelling. However, our data show that (1) cardiovascular changes appear early in the course of blood pressure elevation, (2) the cardiac and vascular changes develop in parallel, and (3) structural remodelling is not solely explained by the degree of blood pressure elevation since blood pressure was similar in the two BH subgroups. Thus, other factors than blood pressure appear to be important determinants of structural adaptation in mildly hypertensive states.
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