Cell size and capillary supply of the hypertensive rat heart: quantitative study

K. Rakusan, P. W. Hrdina, Z. Turek, E. G. Lakatta, H. A. Spurgeon, G. D. Wolford

Research output: Contribution to journalArticle

Abstract

Cardiac mass, cell size and capillary supply were studied in the hearts of spontaneously hypertensive rats (SHR) and compared to genetically similar non-hypertensive Wistar-Kyoto (WKY) of three adult ages: 5, 15 and 23 months. The left ventricular weight of SHR was not significantly greater than that of WKY at 5 months, but was 15 months and became even more so by 23 months. This increase could be attributed to hypertrophy of the individual cardiac muscle cells and therefore, the estimated total number of myocytes per left ventricle was essentially the same in all experimental groups. Various indices of the myocardial capillary supply were also investigated. Cardiac hypertrophy in older hypertensive rats was characterized by greater and more variable intercapillary spacing, which may have importance in myocardial oxygen supply.

Original languageEnglish (US)
Pages (from-to)389-395
Number of pages7
JournalBasic Research in Cardiology
Volume79
Issue number4
DOIs
StatePublished - Jul 1 1984
Externally publishedYes

Keywords

  • cardiac aging
  • cardiac hypertrophy
  • diffusion distance
  • spontaneous hypertension
  • terminal vascular bed

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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