scholarly journals Cardiac Hemodynamics During Stimulation of the Right Atrium, Right Ventricle, and Left Ventricle in Normal and Abnormal Hearts

Circulation ◽  
1966 ◽  
Vol 33 (6) ◽  
pp. 933-944 ◽  
Author(s):  
ALBERTO BENCHIMOL ◽  
MARVIN S. LIGGETT
Keyword(s):  
Left Ventricle ◽  
Right Ventricle ◽  
Right Atrium ◽  
Cardiac Hemodynamics ◽  
The Right ◽  
Stimulation Of

Cat heart acetylcholine: structural proof and distribution

1976 ◽  
Vol 231 (3) ◽  
pp. 781-785 ◽  
Author(s):  
OM Brown
Keyword(s):  
Left Ventricle ◽  
Right Ventricle ◽  
Left Atrium ◽  
Right Atrium ◽  
Interventricular Septum ◽  
Pyrolysis Product ◽  
Heart Tissue ◽  
Choline Esters ◽  
The Right ◽  
Cat Heart

The distribution of acetylcholine (ACh) in the cat heart was investigated by a pyrolysis-gas chromatography (PGC) method. The hearts were dissected into various regions and homogenized in acetonitrile in the presence of propionylcholine, internal standard. Following extraction with toluene and hexane, the choline esters were precipitated as the enneaiodide complex. The isolated choline esters were analyzed by PGC, and the peak corresponding to ACh was quantified. The compound extracted from heart tissue that eluted with the retention time of authentic ACh was identified by mass spectrometry as dimethylaminoethylacetate, the pyrolysis product of ACh. ACh concentrations were found to be higher in the atria than the ventricles. In both the atria and the ventricles, a higher content of ACh was found in the right than the left portions: right ventricle, 5.0 compared to left ventricle, 2.0 nmol/g; and right atrium, 16.8 compared to left atrium, 11.3 nmol/g. Some cats were subjected to a bilateral cervical vagotomy 3 wk before removal and analysis of heart tissue. Hearts from vagotomized cats contained less ACh than controls in the right ventricle (-31%), right atrium (-54%), SA node (-42%), and papillary muscle (-53%), but no decreases were found in the left ventricle, left atrium, or interventricular septum.

Cardiac hydatid cyst interposed between the right atrium and right ventricle on the tricuspid valve

2021 ◽  
pp. 021849232098844
Author(s):  
Hicham Harmouchi ◽  
Mustapha El Kouache ◽  
Marwane Lakranbi ◽  
Yassine Ouadnouni ◽  
Mohammed Smahi
Keyword(s):  
Left Ventricle ◽  
Right Ventricle ◽  
Hydatid Cyst ◽  
Tricuspid Valve ◽  
Right Atrium ◽  
Common Site ◽  
Radical Treatment ◽  
The Right

Hydatidosis disease is commonly localized in the lungs and liver and the radical treatment remains surgery. Cardiac hydatid cyst is a rare and particular location disease that can be associated with serious complications. The most common site in the heart according to the is the left ventricle. We describe a case of cardiac hydatid cyst localized between the right atrium and right ventricle on the tricuspid valve in a 15-year-old patient.

Acute effects of laser myocardial ablation in ex vivo and in vivo

2021 ◽  
Vol 28 (1) ◽  
pp. 47-54
Author(s):  
Н. I. Condori Leandro ◽  
A. D. Vakhrushev ◽  
L. E. Korobchenko ◽  
E. G. Koshevaya ◽  
L. B. Mitrofanova ◽  
...  
Keyword(s):  
Left Ventricle ◽  
Right Ventricle ◽  
Right Atrium ◽  
Ex Vivo ◽  
Laser Applications ◽  
Lesion Depth ◽  
Experimental Animals ◽  
Lesion Diameter ◽  
The Right

Aim. To study and compare the lesions characteristics of laser energy in heart ex vivo and in experimental large animals.Materials and methods. For the ex vivo experiment a pig heart was obtained from a local slaughterhouse. Laser applications were applied using power 15-30 W in the left and right ventricles 5-50 seconds in duration. Immediately after ablation, examination was performed to determine myocardial damage characteristics at each point. In the experimental study, 7 sheep were included, laser applications were performed under fluoroscopic control in the right atrium with power 10, 15 and 20 W, 10-25 s; in the right ventricle 20, 25 and 30 W for 10-40 s; and in the left ventricle 20, 25 and 30 W for 20-40 s. The animals were euthanized and macroscopic examination of laser lesions was performed.Results. A total of 27 laser applications were performed on the heart ex vivo, all lesions were visualized as white spots on the endocardial surface. The maximum lesion depth was 9 mm achieved when using 20 W /50 s, the maximum lesion diameter was 6 mm, when using 25 W /40 s. The minimum lesion diameter and depth were observed when using 30 W /5 s, 2x1 mm. A total of 48 laser applications were performed in experimental animals, in one experimental animal was observed a transmural lesion in the right atrium when using 15 W /20 s. In 3 out of 7 experimental animals, transmural lesions were observed in the right ventricle when using 20 W /30 s; 20 W /40 s and 30 W /10 s. In the left ventricle, transmural lesions were observed in 2 animals, using 15 W /20 s and 20 W /40 s. In the ex vivo study, there was a strong positive correlation between ablation energy and lesion depth (R=0.91, P<0.05) and lesion volume (R=0.73, P<0.05); while there was no such statistical correlation in vivo.Conclusions. Laser ablation 15-20 W for 15-40 s seems to be optimal for achieving the deepest lesions in the atrium and ventricular myocardium. In our small pilot study with fiberoptic catheter ablation on a beating heart there was no correlation between energy delivered and the depth and volume of necrotic myocardium.

scholarly journals Surgical Resection of Atypical Metastatic Melanoma to the Atriocaval Junction: A Case Report

2021 ◽  
Author(s):  
Vitalis Osuji ◽  
Maha Alkhuziem ◽  
Daniel Beckman
Keyword(s):  
Case Report ◽  
Left Ventricle ◽  
Right Ventricle ◽  
Metastatic Melanoma ◽  
Surgical Resection ◽  
Right Atrium ◽  
Cardiac Metastasis ◽  
Metastatic Lesions ◽  
Direct Extension ◽  
The Right

Metastatic tumors to the heart include lymphomas, sarcoma, leukemia, and melanoma. Of these, metastatic melanoma is the most common, and are usually hematogenous, where metastatic lesions can be present in the left ventricle, right atrium, and/ or the right ventricle. We present an atypical metastatic melanoma pattern, where cardiac metastasis originated by direct extension from the adjacent gastric mesentery. We also present our trans-cardiac resection approach, which was the safest way to access the cardiac metastasis intra-operatively without disrupting the tumor.

Double outlet left atrium with co-existing double inlet left ventricle and discordant atrioventricular connections

1991 ◽  
Vol 1 (2) ◽  
pp. 155-157 ◽  
Author(s):  
James P. Gnanapragasam ◽  
Allan B. Houston ◽  
Robert H. Anderson
Keyword(s):  
Left Ventricle ◽  
Right Ventricle ◽  
Left Atrium ◽  
Right Atrium ◽  
Post Mortem ◽  
Post Mortem Examination ◽  
The Right ◽  
Double Inlet Left Ventricle

SummaryWe describe an unusual heart in which double outlet from the left atrium resulted in atrioventricular connections to a dominant left ventricle and to a left-sided rudimentary right ventricle, while the right atrium also connected to the left ventricle. This produced, in effect, double inlet left ventricle in association with discordant atrioventricular connections. The diagnosis was made by echocardiography and confirmed at post mortem examination.

scholarly journals P686 Right atrial, right ventricular and pulmonary cement embolism: a rare complication of percutaneous vertebroplasty

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
S Akhunova ◽  
R Khayrullin ◽  
N Stekolshchikova ◽  
M Samigullin ◽  
V Padiryakov
Keyword(s):  
Pulmonary Artery ◽  
Right Ventricle ◽  
Right Atrium ◽  
Percutaneous Vertebroplasty ◽  
Rare Complication ◽  
Clinical Manifestations ◽  
Stable Condition ◽  
Right Atrial ◽  
Cement Embolism ◽  
The Right

Abstract A 68-year-old man was admitted to the hospital with complaints of pain in the lumbar spine. He had L5 disc herniation, Spinal stenosis of the L5 root canal - S1 on the right in the past medical history. Percutaneous vertebroplasty at the level of L3 and Th8 vertebral bodies was performed six months ago due to painful vertebral hemangioma. The man is suffering from arterial hypertension, receives antihypertensive therapy. During routine transthoracic echocardiography, a hyperechoic structure with a size of 9.5 x 0.9 cm was found in the right atrium and right ventricle. Chest computed tomography with contrast enhancement revealed signs of bone cement in the right atrium and right ventricle, in the right upper lobe artery, in the branches of the upper lobe artery, in the paravertebral venous plexuses. Considering the duration of the disease, the stable condition, the absence of clinical manifestations and disorders of intracardiac hemodynamics, it was decided to refrain from surgical treatment. Antiplatelet therapy and dynamic observation were recommended. Conclusion Percutaneous vertebroplasty is a modern minimally invasive surgical procedure for the treatment of degenerative-dystrophic diseases of the spine. However, the cement can penetrate into the paravertebral veins and migrate to the right chambers of the heart and the pulmonary artery. This clinical case demonstrates asymptomatic cement embolism of the right chambers of the heart and pulmonary artery after percutaneous vertebroplasty, detected incidentally during routine echocardiography. Abstract P686 Figure.

Angiosarcoma of the right atrium and right ventricle

2017 ◽  
Vol 32 (12) ◽  
pp. 807-808 ◽  
Author(s):  
Jinaga Nageswar Rao ◽  
Deepak Gowda G ◽  
Rajan Anand ◽  
Neelam B. Desai
Keyword(s):  
Right Ventricle ◽  
Right Atrium ◽  
The Right

Regulation of K+ and Ca2+ channels in experimental cardiac failure

1991 ◽  
Vol 261 (6) ◽  
pp. H1979-H1987 ◽  
Author(s):  
M. Gopalakrishnan ◽  
D. J. Triggle ◽  
A. Rutledge ◽  
Y. W. Kwon ◽  
J. A. Bauer ◽  
...  
Keyword(s):  
Heart Failure ◽  
Left Ventricle ◽  
Right Ventricle ◽  
Cardiac Failure ◽  
Radioligand Binding ◽  
Weight Ratio ◽  
Left Ventricular ◽  
Coronary Artery Ligation ◽  
Artery Ligation ◽  
The Right

To examine the status of ATP-sensitive K+ (K+ATP) channels and 1,4-dihydropyridine-sensitive Ca2+ (Ca2+DHP) channels during experimental cardiac failure, we have measured the radioligand binding properties of [3H]glyburide and [3H]PN 200 110, respectively, in tissue homogenates from the rat cardiac left ventricle, right ventricle, and brain 4 wk after myocardial infarction induced by left coronary artery ligation. The maximal values (Bmax) for [3H]glyburide and [3H]PN 200 110 binding were reduced by 39 and 40%, respectively, in the left ventricle, and these reductions showed a good correlation with the right ventricle-to-body weight ratio in heart-failure rats. The ligand binding affinities were not altered. In the hypertrophied right ventricle, Bmax values for both the ligands were not significantly different when data were normalized to DNA content or right ventricle weights but showed an apparent reduction when normalized to unit protein or tissue weight. Moderate reductions in channel densities were observed also in whole brain homogenates from heart failure rats. Assessment of muscarinic receptors, beta-adrenoceptors and alpha 1-adrenoceptors by [3H]quinuclidinyl benzilate, [3H]dihydroalprenolol, and [3H]prazosin showed reductions in left ventricular muscarinic and beta-adrenoceptor densities but not in alpha 1-adrenoceptor densities, consistent with earlier observations. It is suggested that these changes may in part contribute to the pathology of cardiac failure.

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