Biomedical subjects

M C Rusu

Publications and source records attributed to M C Rusu.

5 recordsLinked to original sources

PubMed2006

A rare anatomic variant: the lateral position of the external carotid artery.

During educational dissections a rare anatomic variant was encountered at the level of the right carotid triangle of a human adult male specimen. The variant was unilateral. On that side the common carotid artery bifurcated slightly above the level of the upper border of the thyroid cartilage, but the external carotid artery was posterolateral to the internal carotid artery and the anterior branches of the external carotid artery (superior thyroid, lingual and facial arteries) initially crossed over the internal carotid artery before continuing with a normal anatomical course. The possibility of an inversed disposition of the internal and external carotid arteries must be held in mind when performing arterial ligatures in the carotid triangle, to avoid damage to the internal carotid artery or haemorrhagic accidents.

Cadaver↗

PubMed2006

Considerations on the sinus node microangioarchitecture.

The importance of the sinus node as the cardiac pacemaker is well known. The aim of the present study was to investigate the microangioarchitecture at the level of the sinus node. Ten human adult hearts were injected with India ink in the initial segments of the coronary arteries. Pieces were drawn and diaphanized. The results of the study can be summarized: (1) the sinus node is rather an irregularly shaped structure, with peripheral strands intermingling with strands of the atrial myocardium; at this level two vascular patterns can be recognized: (a) the myocardial capillary networks that parallels the muscular bundles, and (b) the peripheral nodal networks built upon dichotomizing arterioles; (2) it seems that while the thick and large sinus node artery does not branch in the nodal tissue, the blood supply of this tissue is ensured by the peripheral nodal networks; (3) characteristically, in the periphery of the nodal tissue are largely present glomeruli made by capillaries with pericellular dispositions. The results strongly suggest that the nodal tissue is mainly supplied from its periphery and the sinus node artery is rather a scaffold than a supplier of that tissue.

Carbon↗

PubMed2006

Considerations on the left papillary muscles microangioarchitecture.

The aim of the present study was to bring macroscopic and microscopic evidence on the left papillary muscles blood supply in human hearts. For the study were used human adult hearts from patients without clinically known cardiac ischemic history. Ten hearts were used for injecting China ink in the coronary arteries and other twenty hearts were dissected to evidence the characteristics of the main arteries of the left papillary muscles. Pieces - left papillary muscles - were drawn from the injected hearts and diaphanised. In all dissected hearts the left anterolateral papillary muscles were supplied by the left coronary system: anterior interventricular artery, second diagonal branch and left (obtuse) marginal artery. In 70% the left posteromedial papillary muscles were supplied by the right coronary system (posterior interventricular artery, left retroventricular artery) and in 30% by the left coronary system (circumflex artery). The left papillary muscles were supplied each by one or two main arteries that penetrated the muscles longitudinally. The ventricular wall attaching the papillary muscles was supplied by the subepicardial vessel sending the main arteries of the papillary muscles but also by neighbor subepicardial vessels distributed in that wall. The mural vessels were finer than the papillary muscles main arteries. Injected papillary muscles presented each with two systems of blood perfusion: one represented by segmental centers of arterial branching and distribution of the main arteries of the muscle and other represented by capillary extensions of the mural networks at that level. From the segmental branching centers were perfused the neighbor segments of the papillary muscles and intrasegmental anastomoses were recognized. The microvascular study of the left papillary muscles proves the usual overlapping of sources for segmental supply; this overlapping is reinforced by the high capillary density to ensure the vascularisation of the papillary muscles.

Adult↗

PubMed2006

Study of the diameter and number of the pulmonary veins orifices.

The present study was made in the anatomy laboratory on 100 heart specimens. It was studied the morphological parameters about diameter and number of the atrial orifices of the pulmonary veins. The number of the orifices and their diameter depends on the lungs weight. Generally (70% of the cases) the orifices number is four and rarely three or five. An increased number of orifices are more frequently in the right side and a decreased number especially in the left side. The orifices diameter is much larger at the male's veins than the female's ones, and much larger in the right than the left side and also much larger at the superiors than the inferior veins.

Coronary Circulation↗

PubMed2006

Human bilateral doubled renal and testicular arteries with a left testicular arterial arch around the left renal vein.

During educational dissections at a human adult specimen, male, a complex picture of anatomical variants was encountered. Bilateral doubled renal arteries were found: on the right side superior hilar and inferior hilar renal arteries and on the left side superior hilar and inferior polar renal arteries. All these renal arteries emerged from the abdominal aorta. Also bilateral doubled testicular arteries were found. On the right side the medial testicular artery emerged from the abdominal aorta while the lateral testicular artery left the superior renal artery. On the left side the lateral and medial testicular arteries emerged as a common trunk from the abdominal aorta. This trunk originated from aorta behind the left renal vein and arched over that vein to descend and to divide in front of it. The two kidneys were keeping a fetal aspect, lobulated, more obvious on the left side. The right hepatic artery was found originating from the superior mesenteric artery; it coursed posterior to the portal vein and was sending the cystic artery. The right gastric artery emerged from the initial segment of the gastro-duodenal artery. Even though some morphological and topographical aspects regarding this complex anatomical variation have been described, it seems that the bilateral presence of doubled renal and testicular arteries has not been reported. The left testicular trunk arching over the left renal vein must be considered when discussing the nutcracker syndrome. During diagnostic and surgical approaches at the levels of the renal, gonadal and hepatic vessels, associations of anatomical variants and the bilateral presence of these must be suspected.

Adult↗