Il cuore destro e il circolo polmonare nell'iperteso.

Translated title of the contribution: The right ventricle and pulmonary circulation in hypertensive patients

M. D. Guazzi, S. Riva, M. Guazzi, M. Dardani, M. Berti, E. Tosi, M. Alimento

Research output: Contribution to journalArticle

Abstract

Elevated blood pressure and vascular resistance in patients with systemic hypertension are paralleled by a proportional rise in pressure and resistance in the lesser circulation. It was hypothesized that increased systemic reaction to adrenergic stimulation is shared by the pulmonary vessels. Thus normotensive subjects and patients with primary hypertension were investigated during mental arithmetic and the cold pressor test. Both groups responded to both stimuli; during arithmetic pressure reaction was mediated through an increase of cardiac output, and during the cold pressor test through a predominant rise in systemic vascular resistance. The pressure changes were emphasized in the hypertensive population. Pressure in the pulmonary artery in normotensive subjects was not affected by cold and was slightly raised (systolic) during arithmetic. In hypertensive patients, on the other hand, systolic and diastolic pressures were consistently augmented by both tests, and pulmonary arteriolar resistance rose by 42% and 29% of control during the cold pressor test and arithmetic, respectively. Changes in resistance reflected neurally-mediated vasoconstriction but not variations in the passive relationship between pressure and flow, since during arithmetic, for a similar rise in flow the driving pressure across the lungs was steady in normotensive subjects and rose significantly in hypertensive patients. In these same patients pressure was augmented by cold test in the absence of substantial changes in flow. At baseline and during tests pulmonary wedge pressure, pleural pressure, arterial blood gases, and pH were similar in the two populations. The intravenous infusion of similar scalar doses of norepinephrine (the same mediator released during cold test) was not effective on the pulmonary vessels of normotensives and caused an obvious vasoconstriction in hypertensives.(ABSTRACT TRUNCATED AT 250 WORDS)

Original languageItalian
Pages (from-to)209-214
Number of pages6
JournalRecenti Progressi in Medicina
Volume81
Issue number4
Publication statusPublished - Apr 1990

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Pulmonary Circulation
Heart Ventricles
Pressure
Lung
Blood Pressure
Vasoconstriction
Vascular Resistance
Hypertension
Pulmonary Wedge Pressure
Intravenous Infusions
Cardiac Output
Adrenergic Agents
Pulmonary Artery
Population
Norepinephrine
Arterial Pressure
Gases

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Il cuore destro e il circolo polmonare nell'iperteso. / Guazzi, M. D.; Riva, S.; Guazzi, M.; Dardani, M.; Berti, M.; Tosi, E.; Alimento, M.

In: Recenti Progressi in Medicina, Vol. 81, No. 4, 04.1990, p. 209-214.

Research output: Contribution to journalArticle

Guazzi, MD, Riva, S, Guazzi, M, Dardani, M, Berti, M, Tosi, E & Alimento, M 1990, 'Il cuore destro e il circolo polmonare nell'iperteso.', Recenti Progressi in Medicina, vol. 81, no. 4, pp. 209-214.
Guazzi MD, Riva S, Guazzi M, Dardani M, Berti M, Tosi E et al. Il cuore destro e il circolo polmonare nell'iperteso. Recenti Progressi in Medicina. 1990 Apr;81(4):209-214.
Guazzi, M. D. ; Riva, S. ; Guazzi, M. ; Dardani, M. ; Berti, M. ; Tosi, E. ; Alimento, M. / Il cuore destro e il circolo polmonare nell'iperteso. In: Recenti Progressi in Medicina. 1990 ; Vol. 81, No. 4. pp. 209-214.
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