scholarly journals Noncompaction of the left ventricle: a new cardiomyopathy is presented to the clinician

2006 ◽  
Vol 124 (1) ◽  
pp. 31-35 ◽  
Author(s):  
Fábio Cañellas Moreira ◽  
Marcelo Haertel Miglioransa ◽  
Marcela Pozo Mautone ◽  
Karen Reetz Müller ◽  
Fernando Lucchese
Keyword(s):  
Mortality Rate ◽  
Left Ventricle ◽  
Case Series ◽  
Rare Condition ◽  
Ventricular Myocardium ◽  
Left Ventricular ◽  
Accurate Diagnosis ◽  
Left Ventricular Myocardium ◽  
Poor Knowledge

Noncompaction of the left ventricular myocardium is a morphogenetic abnormality involving loss of compaction of the myocardial fiber meshwork during intrauterine life. It is an extremely rare condition, accounting for only 0.05% of the cases evaluated in databanks. It has been described in both genders, in many ethnic groups and at different ages. Recently published studies of case series have shown a high mortality rate among these patients during follow-up of up to 48 months. Many cases have so far been misdiagnosed due to poor knowledge of the findings relating to this syndrome. There needs to be an attempt at early and accurate diagnosis, because of the need to investigate the patient’s family upon such diagnosis, and today this can be achieved using echocardiographic criteria.

scholarly journals Successful Surgical Treatment of Postinfarction Rupture of Left Ventricular Myocardium

2020 ◽  
Vol 9 (1) ◽  
pp. 140-147
Author(s):  
M. K. Mazanov ◽  
N. I. Kharitonova ◽  
A. A. Baranov ◽  
S. Yu. Kambarov ◽  
N. M. Bikbova ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Left Ventricle ◽  
Surgical Intervention ◽  
Ventricular Myocardium ◽  
Left Ventricular ◽  
Left Ventricular Myocardium ◽  
Free Wall ◽  
Fatal Complication ◽  
Widespread Availability ◽  
Complications Of Myocardial Infarction

ABSTRACT. The rupture of the left ventricle free wall is one of the most dangerous complications of myocardial infarction. Due to the widespread availability of echocardiography method, the detection of this fatal complication and the number of lives saved after surgery grew. The survival of patients depends on early diagnosis, stabilization of the patient’s condition, promptness and tactics of surgical intervention. We report a case of successful closure of a rupture of the left ventricle free wall on the 15th day after myocardial infarction.

scholarly journals DIAGNOSTIC OF THE ATHLETE’S HEART AND FACTORS AFFECTING ITS DEVELOPING

2021 ◽  
Vol 74 (5) ◽  
pp. 1158-1163
Author(s):  
Serhiy V. Popov ◽  
Oleksandr I. Smiyan ◽  
Andrii M. Loboda ◽  
Viktoriia O. Petrashenko ◽  
Olena K. Redko ◽  
...  
Keyword(s):  
Left Ventricle ◽  
Heart Development ◽  
Ventricular Myocardium ◽  
Left Ventricular ◽  
Athlete’S Heart ◽  
Left Ventricular Myocardium ◽  
Factors Affecting ◽  
Ultrasound Study ◽  
And Function ◽  
Athlete's Heart

The aim: Studying the features of the structure and function of the heart in athletes and identifying the factors that influence the development of these changes. Materials and methods: The study included 54 athletes, 29 men and 25 women. The ultrasound study was performed according to standard methods with determining the size of the main structures of the heart, indicators normalized to body surface area, height. Results: The heart of dilatation and hypertrophy of the left ventricular myocardium were found in 25.93% of the athletes. When comparing the diameter of the left ventricle of individual athletes with the average values of the norm, their excess was found in 94.44% of athletes. The Odds ratio (OR) of the relationship between left ventricle diameter (LVd) and time of the exercise less than 10 y was 16.13, time of the exercise less than 5 y – 0.17 (p <0.05). OR of increase LVd to age less than 20 years was 3.56 units (p <0.05). The ejection fraction was above the normative mean in 75.93%, as well as the ratio of the periods of filling of the ventricles. Conclusions: The most common sign of an athlete’s heart development was left ventricular dilatation, which occurred at a rate of 25 percent. Age less than 20 years and the duration of sports activities from 5 to 10 years is associated with a higher frequency of the athlete’s heart.

scholarly journals Physiology-Based Electrocardiographic Criteria for Left Bundle Branch Capture

2020 ◽  
Author(s):  
Marek Jastrzębski ◽  
Grzegorz Kiełbasa ◽  
Karol Curila ◽  
Paweł Moskal ◽  
Agnieszka Bednarek ◽  
...  
Keyword(s):  
Left Ventricle ◽  
Ventricular Myocardium ◽  
Left Ventricular ◽  
Left Ventricular Myocardium ◽  
Peak Time ◽  
List Type ◽  
Bundle Branch Block ◽  
Characteristics Analysis ◽  
Qrs Morphology ◽  
Ecg Criteria

AbstractBackgroundDuring left bundle branch (LBB) area pacing, it is important to confirm that the capture of the LBB is achieved, not just the capture of only the adjacent left ventricular myocardium (LV septal capture). Our aim was to establish ECG criteria for LBB capture by analyzing ECGs with confirmed LBB capture and non-capture. We hypothesized that since LBB pacing results in physiologic depolarization of the left ventricle then the native QRS can serve as a reference for the diagnosis of LBB capture in the same patient.MethodsOnly patients with direct evidence of LBB capture (output-dependent or refractoriness-dependent QRS morphology transition) were included. Several QRS characteristics were compared between the native rhythm and different types of LBB area capture. Receiver-operator characteristics analysis was performed to determine the optimal V6 R-wave peak time (RWPT) cut-off for LBB diagnosis.ResultsA total of 357 ECG tracing (124 patients) were analyzed: 118 with native rhythm, 124 with non-selective LBB capture, 69 with selective LBB capture and 46 with LV septal capture. Our hypotheses that during LBB capture the paced V6 RWPT (measured from QRS onset) equals the native V6 RWPT and that the paced V6 RWPT (measured from the stimulus) equals the LBB potential to V6 R-wave peak interval were positively validated. Criteria based on these rules had sensitivity and specificity of 98.0–88.2% and 85.7–95.4%, respectively. The optimal and 100% specific V6 RWPT values for differentiation between LBB capture and LV septal capture in patients with narrow QRS / right bundle branch block were 83 ms and 74 ms, respectively; while in patients with left bundle branch block/asystole/ventricular escape the optimal and 100% specific V6 RWPT values were 101 ms and 80 ms, respectively.ConclusionsNovel criteria for LBB capture were developed and optimal V6 RWPT cut-offs were determined.What this study addsWe showed that LBB pacing truly reproduce the physiological depolarization of the left ventricle since the paced V6 RWPT equals the native conduction V6 RWPT.Individualized LBB capture criteria, that use the native QRS as a reference, were developed.The optimal V6 RWPT values for differentiation between LBB capture and LV septal capture were determined, separately for patients with healthy and diseased LBB.

Preparation of Nano Zinc Particles and Evaluation of Its Application in Mouse Myocardial Infarction Model

2021 ◽  
Vol 21 (2) ◽  
pp. 1196-1201
Author(s):  
Yue Song ◽  
Lisong Wu ◽  
Jian Cao ◽  
Bangrong Song
Keyword(s):  
Myocardial Infarction ◽  
Left Ventricle ◽  
Raw Materials ◽  
Ventricular Myocardium ◽  
Left Ventricular ◽  
Iron Chloride ◽  
Left Ventricular Myocardium ◽  
Zinc Nanoparticles ◽  
Synthesis Conditions ◽  
Nano Zinc

Nanometer zinc particles were synthesized by orthogonal test with manganese chloride, iron chloride and zinc sulfate as raw materials and NaOH as coprecipitating agent. The optimum synthesis conditions of coprecipitation method were obtained and the samples were characterized by various means. In this experiment, the SV, EF, FS, lvaws, lvawd, lvpws and lvpwd of left ventricle in mice with myocardial infarction were decreased, while the LVEDd, lveds and lvevs were increased in the environment exposed to ultrafine zinc nanoparticles, which proved that exposure to ultrafine zinc nanoparticles could lead to the enlargement of left ventricle, the thinning of ventricular wall, and the decrease of cardiac systolic and diastolic function. Further study on the heart tissue sections showed that the normal left ventricular myocardium of mice exposed to ultrafine zinc nanoparticles decreased, apoptotic cells increased, collagen content increased significantly, and myocardial fibrosis intensified. At the same time, WGA staining results of myocardial cell membrane showed that inhalation of ultra-fine nano zinc particles increased the size of myocardial infarction cells and disordered cell arrangement, which further proved that inhalation of ultra-fine nano zinc particles accelerated left ventricular pathological remodeling. The results of this study prove that the ultra-fine zinc nanoparticles in the air play an important role in the structural remodeling of myocardial infarction heart, and provide a theoretical basis for formulating targeted policies to control air pollution.

Absence of the left ventricular myocardium in a newborn

1996 ◽  
Vol 6 (4) ◽  
pp. 344-347 ◽  
Author(s):  
Angelika Lindinger ◽  
Yvonne Masur ◽  
Hans-Gerhard Limbach
Keyword(s):  
Aortic Valve ◽  
Left Ventricle ◽  
Ventricular Myocardium ◽  
Arrhythmogenic Right Ventricular Dysplasia ◽  
Left Ventricular ◽  
Adolescent And Young Adult ◽  
Left Ventricular Myocardium ◽  
Fatty Replacement ◽  
Myocardial Fibers ◽  
The Right

SummaryAbsence of myocardial fibers in the right ventricle is the essence of so-called Uhl's anomaly, which should be distinguished from the fatty replacement producing arrhythmogenic right ventricular dysplasia of the adolescent and young adult. In this report, we describe a newborn with nearly complete absence of the myocardium of the left ventricle. The infant died on the seventh day because of myocardial incompetence of the left ventricle, which was unable to open the aortic valve.

A prosthetic myocardium for repair of localized defects of the left ventricle: Concept and hemodynamic feasibility

1980 ◽  
Vol 3 (3) ◽  
pp. 173-179
Author(s):  
A. Kantrowitz ◽  
T. Igari ◽  
I. Hayashi ◽  
P.S. Freed
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Experimental Investigation ◽  
Left Ventricle ◽  
Treatment Plan ◽  
Surgical Excision ◽  
Ventricular Myocardium ◽  
Left Ventricular ◽  
Surgical Approaches ◽  
Left Ventricular Myocardium

As an approach to the treatment of patients with large but circumscribed akinetic or dyskinetic regions in the left ventricular myocardium as sequelae of acute myocardial infarction, excision of the defect and implantation of a mechanical functional equivalent of myocardium is suggested. Experimental investigation of this technique is described. Hemodynamic data from a series of dog experiments indicate that activation of the prosthetic myocardium after excision of the left ventricle is followed by improvement in various hemodynamic parametres of interest Although substantial experimental work must be completed and difficult bioengineering problems solved, preliminary results have encouraged us to continue our investigations of the prosthetic myocardium. An imposing array of treatment methods is now available to the clinician who must deal with the sequelae of acute myocardial infarction. Selecting from pharmacologic, electrophysiologic, and surgical approaches the physician can in many instances design a treatment plan precisely tailored to the clinical problem. Large left ventricular aneurysms and their functional equivalents of ventricular dyskinesis or hypokinesis continue, however, to represent a class of problems in which established techniques have been less then satisfactory. Surgical excision with closure of the defect is regarded as effective for small aneurysms, but such procedures may so compromise cardiac output in patients with large ones as to be unacceptable. Unfortunately, it is just the latter group in which medical palliation is least likely to be effective in managing congestive failure, angina, and other pathophysiologic manifestations. A relatively unsual approach derived from in-series techniques of mechanical assistance to the failing circulation (1) offers the theoretical possibility of a treatment tailored to the problem of a large ventricular aneurysm. Experimental investigation of this technique in the Surgical Research Laboratory at the Sinai Hospital of Detroit has progressed to the point that a report of our experiences to date may be of interest.

scholarly journals Clinical-laboratory Manifestations of Myocarditis in Dogs

2019 ◽  
Author(s):  
Valeriy Shumakov ◽  
Ludmila Kletikova ◽  
Alexanderx Martynov ◽  
Victoria Khrushcheva
Keyword(s):  
Blood Pressure ◽  
Mitral Valve ◽  
Left Ventricle ◽  
Left Atrium ◽  
Blood Pressure Reduction ◽  
Clinical Signs ◽  
Ventricular Myocardium ◽  
Left Ventricular ◽  
Left Ventricular Myocardium ◽  
Electrocardiographic Study

The leading clinical signs of myocarditis in dogs were the sudden development of signs of disease, refusal to eat, dyspnea at rest, rapid fatigue. At the diagnostic stage, the position of animals forced, lying, increased breathing speed up to 60-72 movements per minute, pale visible mucous membranes and conjunctiva, weak filling of pulse, rapid filling of capillaries, high blood pressure, increase in the number of leukocytes up to 25–27×109/l, SRS up to 15,4–17,4 mg/l, troponin up to 3,85–4,2 ng/ml. Electrocardiographic study established sinus or ectopic rhythm, heart rate 133– 198 oz/min, conductivity disturbance and deceleration. ECHOKG showed moderate expansion of the left ventricle, moderate expansion of the left atrium. Sealing of the mitral valve leaves, regurgitation on the mitral valve of the first degree. Left ventricular myocardium is inhomogeneous, wall echogenicity is increased. Fraction of contractility 16–18 %. After establishment of a dietary regime and correction of conditions of the maintenance, to dogs strictly with a twelve-hour interval twice a day are appointed vedmedin (0,25 mg/kg), sotalol (1,5 mg/kg), sinulox (20 mg/kg), mexidol-vet (1 table), verospheron (1 mg/kg). As a result of four-week monitoring of patients’ condition positive results were noted: lack of dyspnea, normalization of pulse rate and blood pressure, reduction of capillary filling rate up to 1 second, leukocyte concentration up to 12,6–15,7 ×109/l, SRS up to 1,3–1,4 mg/l, troponin up to 0,09–0,17 ng/ml. The electrocardiographic study showed a decrease in the height of teeth R and P, increase in the intervals P-Q and Q-T. The sinus rhythm is irregular. Echokg showed expansion of the left ventricle, moderate expansion of the left atrium. Sealing of mitral valve leaves, regurgitation on mitral valve of the first degree. Left ventricular myocardium is less heterogeneous, wall echogenicity is increased. Fraction of contractility 23–24 %. It is difficult to predict the outcome of the disease at this stage, as the age of dogs is 7–12 years, and in many respects the quality of life will be provided by their owners.

scholarly journals Effects of Supraphysiological Doses of Steroids on the Left Ventricle of Sedentary Mice: Morphometric Analysis

2019 ◽  
Vol 36 (02) ◽  
pp. 091-096 ◽  
Author(s):  
Érika Larissa Poscidônio de Souza ◽  
Rodrigo Leandro Dias ◽  
Raíssa Santiago Rios ◽  
Tânia Martins Vieira ◽  
Bruno Damião ◽  
...  
Keyword(s):  
Left Ventricle ◽  
Anabolic Steroids ◽  
Signs And Symptoms ◽  
Ventricular Myocardium ◽  
Optical Microscope ◽  
Left Ventricular ◽  
Left Ventricular Cavity ◽  
Control Group ◽  
Left Ventricular Myocardium ◽  
Androgenic Steroids

AbstractAnabolic androgenic steroids (AAS) are synthetic compounds derived from testosterone, which are widely used in supraphysiological doses by people seeking an aesthetic effect. The objective of the present experiment was to evaluate the possible morphometric changes in the cardiac left ventricle caused by the administration of supraphysiological doses of the anabolic steroids testosterone cypionate and stanozolol in the hearts of young sedentary mice, to serve as a comparative parameter with young mice that were submitted to exercise. We have used 60 hearts of sedentary young Swiss mice, aged ∼ 90 days old (young-adult), with a body weight between 40 and 50 g. The animals were divided into three groups: the control group, the testosterone cypionate group, and the stanozolol group. For the analysis, 10 distinct sections of the apex, of the middle region, and of the base of the heart were selected, followed by an optical microscope measurement with a 2.5x magnification. The results obtained show an increase in both myocardial thickness and left ventricular cavity diameter in the two groups of male animals in relation to the control group; however, in females, an increase in the thickness of the left ventricular myocardium was observed only for the stanozolol group. These results suggest that the cardiac alterations observed in the present study may be directly related to some signs and symptoms already described in the literature, such as hypertension, arrhythmias, infarction, sudden death, and other cardiovascular diseases.

Pressure-Circumference Relations of Left Ventricle

1956 ◽  
Vol 186 (1) ◽  
pp. 115-121 ◽  
Author(s):  
Robert F. Rushmer
Keyword(s):  
Left Ventricle ◽  
Myocardial Contractility ◽  
Left Ventricular Pressure ◽  
Cardiovascular Responses ◽  
Ventricular Myocardium ◽  
Left Ventricular ◽  
Left Ventricular Myocardium ◽  
Work Output ◽  
External Work ◽  
Cardiac Adaptation

Changes in left ventricular pressure and left ventricular circumference of intact animals have been recorded simultaneously during spontaneous and induced cardiovascular responses. Mechanisms by which the left ventricular myocardium alters its ‘work output’ are indicated by pressure-circumference loops displayed on a cathode ray oscilloscope. Evidence is presented that the external work of the heart is not necessarily related to the diastolic dimensions in accordance with Starling's law of the heart. Instead, changes in both myocardial contractility and distensibility may play important roles in cardiac adaptation to various conditions.

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