Recording Methods and the Capabilities of Modern Respiratory Rate Monitoring Devices (literature review).

Determination of respiratory rate is a necessary task in assessing the state of health in humans. This review provides a description of modern devices used for recording and monitoring respiratory rate. The advantages and disadvantages of the principles of operation of these devices are discussed.

[Transcheter aortic valve implantation as a method of treatment of chronic heart failure in elderly and old patients: Literature review (part 2).]

The most common heart valve defect among the elderly and senile is aortic valve stenosis. The traditional method of treating severe aortic valve stenosis is open surgery to replace aortic valve. At the same time, a more modern, minimally invasive method of correcting aortic stenosis is transcatheter aortic valve implantation (TAVI). This intervention is primarily indicated for patients of old age suffering from severe chronic heart failure associated with aortic stenosis, who have a high surgical risk. Currently, TAVI has evolved from a complex and dangerous procedure into an effective and safe method of treatment thanks to the development of a new generation of devices. Currently, there are still topical issues of using TAVI in individual clinical cases (use of TAVI in the elderly (60-75 years), TAVI in centenarians (90 years or more), TAVI in frailty, the feasibility of performing TAVI with low surgical risk, etc.), as well as issues related to longevity valves used for TAVI and prognosis in terms of quality and life expectancy.

Results of new-generation self-expanding transcatheter Porticoтм valve implantation in patients with degenerative aortic stenosis.

Aim    To evaluate 30-day results of the transcatheter correction of degenerative aortic stenosis using a novel self-expandable valve, PorticoTM.Material and methods    Transcatheter aortic valve implantation (TAVI) was performed in 42 patients with an intermediate surgical risk (mean age, 74.3±6.5 years, 8 men, 34 women, EuroSCORE II risk, 2.5 (1.5;4.1)) with severe degenerative aortic stenosis (AS). 20 (48 %) patients had ischemic heart disease; 8 (19%) of patients had atrial fibrillation, and 16 (38%) of patients had type 2 diabetes mellitus. Most of the patients (88 %) had preserved systolic function, and 5 patients had a pronounced decrease in left ventricular ejection fraction. Early efficacy and safety of the intervention were evaluated with VARC-2 criteria.Results    In-hospital and 30-day mortality following TAVI was absent. Also, there were no adverse events, including cerebrovascular disorders, perioperative myocardial infarction, and conversion to open surgery. One patient had prosthesis migration to the aorta, which required implantation of the second self-expandable valve. Mean duration of the procedure was 90 min (80;110), fluoroscopy time was 21 min (19;24), and contrast volume 154 ml (200;240). Following TAVI, the mean aortic valve (AV) pressure gradient significantly decreased from 56.1±21.2 to 11.2±4.0 mm Hg, the maximal gradient decreased from 88.9±27.8 to 20.0±7.0 mm Hg, and the AV effective orifice area increased from 0.67±0.2 to 1.9±0.3 cm2 (p<0.001). By the time of discharge from the hospital, all patients showed regression of AS clinical manifestations. The percentage of patients with NYHA functional class III chronic heart failure reduced from 62 % to 7 % (p<0.001) after TAVI. In one case after the implantation, grade 3 aortic regurgitation was observed, which required endovascular occlusion to close the paraprosthetic fistula. Moderate paraprosthetic regurgitation (grade <2) was observed in 3 (7 %) patients. Only 2 (4.8%) patients required permanent pacemaker implantation.Conclusion    Results of the single-center prospective TAVI study using a novel self-expandable valve Porticoтм showed satisfactory hemodynamic parameters, efficacy and safety of the procedure for the 30-day follow-up period. A relatively low radial force of the carcass can be beneficial for reducing the incidence of permanent pacemaker implantation after TAVI.

[Experience of complex application of cardiac contractility modulation by Optimizer Smart System and endovascular mitral valve repair by the MitraClip System in the treatment of heart failure].

A 58-year-old female patient with severe chronic heart failure and mitral regurgitation receiving an optimal drug therapy was implanted with an Optimizer Smart device for modulation of cardiac contractility and underwent transcatheter mitral plasty using a MitraClip system. The complex therapy resulted in a significant clinical improvement and beneficial dynamics of echocardiographic parameters.

Endovascular repair of the aorti arch. / Éndovaskuliarnoe protezirovanie dugi aorty.

AIM: The study was aimed at assessing the in-hospital results of aortic arch endoprosthetic repair using different variants of endovascular supraaortic debranching. PATIENTS AND METHODS: The analysis included 27 patients subjected within the framework of aortic arch endoprosthetic repair to various types of supraaortic endobranching, including the technique of parallel prostheses and implantation of fenestrated stent grafts. We analysed the clinical and morphological status of patients prior to operation, peculiarities of the intervention (type of debranching and Ishimaru's classification zones in which the reconstruction was performed) and in-hospital results of treatment. RESULTS: The patients' mean age amounted to 66 years. The main nosology (70%) was an aortic aneurysm. Nearly in 30% of cases, the operation was performed emergently for acute aortic syndrome. The main causes of refusal from the traditional prosthetic repair included chronic kidney disease (22.5%), chronic obstructive pulmonary disease (11%), acute cerebral ischaemia within the previous 6 months (15%). The technical success rate of the operation was achieved in 100% of cases. The average duration of the intervention amounted to 226 min, with the mean blood loss equalling 355 ml. The majority of reconstructions were performed in zones 1 and 2 according to Ishimaru (59 and 33%, respectively), in 2 (7%) patients prosthetic repair was performed in zone 0. The total number of the aortic branches involved into reconstruction amounted to 45. Intervention-related complications included 3 (11%) cases of acute cerebral circulation impairment, 2 (7.4%) aortic branch occlusions, and 1 (3.7%) type II endoleak. The in-hospital and 30-day mortality rates amounted to 3.7 and 7.4%, respectively. CONCLUSION: Aortic arch endoprosthetic repair using supraaortic endobranching is considered to be an effective alternative method of treatment for patients with various pathology of the aortic arch and contraindications to traditional prosthetic repair involving artificial blood circulation.

[Transcatheter aortic valve implantation in patient with critical aortic stenosis in the setting of cardiogenic shock].

This article presents a clinical case of successful transcatheter aortic valve implantation in an elderly patient with critical aortic stenosis at the stage of systolic dysfunction with development of genuine cardiogenic shock. The role of transcatheter aortic valve implantation in the pathogenetic treatment of acute heart failure due to decompensated aortic stenosis was briefly discussed.

[Takotsubo syndrome (stress-induced cardiomyopathy)]. / Sindrom Takotsubo (stress-indutsirovannaya kardiomiopatiya).

The article presents published and own data about Takotsubo syndrome, a relatively rare heart disease that is similar to acute coronary syndrome, but without significant damage of coronary arteries. The leading pathogenetic factor is the catecholamine-induced stress damage of myocardium with involvement of microvessels. There is a certain underestimation of Takotsubo syndrome by both clinicians and pathologists, so some cases of Takotsubo syndrome are misdiagnosed as acute coronary syndrome. Morphological manifestations of Takotsubo syndrome are characterized by mucoid edema of interstitial myocardial tissue, round-cell infiltration of stroma and focal damage of cardiomyocytes.

[Takotsubo syndrome after palliative transcatheter treatment of acquired aortic stenosis in patient with congenital ventricular septal defect. Case report].

The authors report the clinical case of secondary Takotsubo syndrome developed after transcatheter aortic valve replacement that was performed in compassionate manner in female patient with combination of congenital ventricular septal defect and acquired severe aortic stenosis. In the teams view, Takotsubo syndrome was triggered with profound changes of intracardial hemodynamics subsequent to iatrogenic impairment of preexisting interventricular shunt.

[Role of magnetic resonance imaging in patients with aortic stenosis before and after replacement of the valve].

Risk stratification among patients with aortic stenosis remains inadequate, and there is a clinical need for the correct identification of high-risk patients who would benefit from aortic valve intervention before developing left ventricular decompensation. Since the publication of the results of the PARTNER study, transcatheter aortic valve implantation (TAVI) has become the method of choice for aortic valve stenosis in inoperable patients and is a real alternative to conventional surgical replacement of the aortic valve in high-risk patients. In planning TAVI and postoperative monitoring of a patient from imaging methods, the leading role is played by echocardiography and multispiral computed tomography. However, in recent years, the interest of researchers in the use of magnetic resonance imaging in this category of patients has increased. The review article examines the potential role of magnetic resonance imaging in patients with aortic stenosis before and after TAVI.

[Delayed coronary obstruction of the left main artery after transcatheter aortic valve replacement].

Coronary arteries obstruction associated with transcatheter aortic valve implantation (TAVI) may occur either during the procedure or after it. In the latter coronary obstruction can be further divided into early (7 days after procedure) or delayed one (7 days). Delayed coronary obstruction (DCO) is referred as a rare but devastating complication after TAVI and is associated with the extremely high mortality. This case demonstrates the objective difficulties of timely diagnostics of DCO. Since the results of non-invasive methods are indetermined in most cases, the authors conclude that even low-specific clinical symptoms must be interpreted as the definite rationale for the implementation of invasive diagnostic and treatment strategy.

[Role of contrast enhancement in ultrasound examination of the aortic abdominal portion]. / Rol' kontrastnogo usileniia pri ul'trazvukovom issledovanii briushnogo otdela aorty.

Analysed herein are the data of scientific literature over several last years concerning the use of contrast-enhanced ultrasonography (CEUS) of the abdominal portion of the aorta. Based on the results of Russian and foreign studies, the authors analyse feasibility of using CEUS in various pathological conditions of the aorta, as well as sensitivity, specificity, and prognostic value of the method. Also discussed are advantages and limitations of CEUS compared with other imaging techniques. This is followed by determining appropriate approaches to using the methodology of CEUS in examination of patients after endoprosthetic repair of abdominal aortic aneurysms. Finally, described is own experience of using CEUS in examination of a patient with chronic renal insufficiency after aortic endoprosthetic repair.

[Critical illness - related corticosteroid insufficiency in patients after cardiac surgery and cardiologic emergencies].

Critical illness - related corticosteroid insufficiency (CIRCI) is associated with elevated level of circulating biomarkers of inflammation, pro - coagulant effects, deterioration of systemic inflammatory response syndrome (SIRS) and, consequently, prolonged in - hospital stay and increased mortality of intensive care patients. Incidence of CIRCI widely varies depending on specific patient's population and applied diagnostic thresholds being as high as 30% among postoperative patients on inotropes. CIRCI is a complex clinical and pathophysiological condition with substantial influence on immediate survival and prognosis. Clinical impact of CIRCI as well as pathogenetically based therapy arouse keen interest of intensive care specialists and clinical pathologists. The specific issues of CIRCI in patients after cardiac surgery and cardiology emergencies remain largely under - recognized, so further scrutinization is needed.

[State of the art of the problem concerning endovascular treatment of abdominal aortic aneurysms of infrarenal localization]. / Sovremennoe sostoianie problemy éndovaskuliarnogo lecheniia anevrizm briushnoi aorty infrarenal'noi lokalizatsii.

The problem concerning diagnosis and treatment of abdominal aortic aneurysms (AAA) is important today because of a high proportion of this pathology within the structure of population morbidity and mortality, with a tendency of these indices to increase, as well as high lethality rates in development of complications. Endovascular treatment of aortic aneurysms is one of the most rapidly developing methods of treatment in vascular surgery. Over the last two decades this type of treatment has been playing an important part in the armamentarium of the vascular surgeon and is often considered as primary treatment of patients with AAA of infrarenal localization. Nevertheless, long-term efficacy and reliability of this method have been argued. These argues are based on the fact that according to the findings of various studies the advantages of endovascular treatment of aneurysms over open surgical treatment are completely leveled after 6-8 years. The main disadvantage of endovascular treatment is the necessity of repeat interventions in the long-term period of follow-up. However, in a series of studies repeat interventions in groups of both surgical and endovascular treatment were either not taken into account or not specially studied. It should also be taken into consideration that first European studies were carried out with the use of grafts of first generations, and some of them are not used any more. Therefore, the necessity of carrying out further studies still remains. Perhaps, new generations will be able to decrease the frequency of repeat interventions and thereby improve the overall results of endovascular treatment. The possibilities of endovascular treatment of AAAs will constantly be extended, including due to the development of X-ray equipment and software, as well as at the expense of various auxiliary technologies.

[Use of an iliac branched endoprostheis in endovascular treatment for an abdominal aortic aneurysm combined with aneurysms of both common iliac arteries]. / Ispol'zovanie podvzdoshnogo branshirovannogo endoproteza pri endovaskulyarnom lechenii anevrizmy bryushnoi aorty i obeikh obshchikh podvzdoshnykh arterii.

An abdominal aortic aneurysm appears to be combined with aneurysmatic lesions of the common iliac arteries in 30-40% of cases. Like abdominal aortic aneurysms, aneurysms of the common iliac arteries rarely manifest themselves clinically. The lethality rate in case of rupture is comparable to that for rupture of an abdominal aortic aneurysm. During endoprosthetic repair of abdominal aortic aneurysms combined with aneurysms of the common iliac arteries, in order to prevent endoleaks and to improve the distal zone of fixation of endografts surgeons often resort to embolization of internal iliac arteries, which may lead to ischaemic postoperative complications. One of the methods of preserving pelvic blood flow is the use of an iliac branched endograft. A series of studies evaluating long-term outcomes demonstrated that this method proved to be both safe and effective, and with the suitable anatomy is a method of choice in high surgical risk patients. The present article deals with a clinical case report concerning bilateral endoprosthetic repair of the common iliac arteries, combined with endoprosthetic repair of an abdominal aortic aneurysm, with the description of technical peculiarities of implanting an iliac branched graft.

[Transaortic Implantation of Aortic Valve Bioprosthesis in High-Risk Patient With Simultaneous Off-Pump Coronary Artery Bypass Grafting].

Transaortic approach represents an alternative variant of transcatheter aortic valve implantation (TAVI) which combines benefits of antegrade transapical approach and high safety profile characteristic of transfemoral approach. This method has substantial advantages over subclavian and transapical approaches in cases of pronounced myocardial hypertrophy, left ventricular dysfunction, thinning of left ventricular wall. We describe here a hybrid intervention with simultaneous coronary artery bypass grafting and TAVI in a patient from high surgical risk group with multivessel coronary artery involvement and critical aortic stenosis. The intervention was a successful alternative to open heart surgery with cardiopulmonary bypass.

[Endovascular treatment of spontaneous rupture of the thoracic aorta].

Spontaneous rupture of the aorta is an uncommonly encountered acute surgical aortic pathology characterised by an utterly unfavourable prognosis. The article deals with a case report concerning successful endovascular treatment of spontaneous rupture of the thoracic portion of the aorta, followed by discussion of problems regarding aetiology, diagnosis, and therapeutic policy for such pathology.

[Experience with implantation of a fenestrated endoprosthesis to a patient with a juxtarenal aortic aneurysm].

In patients with a juxtarenal abdominal aortic aneurysm the unaltered segment is frequently insufficient to secure adequate proximal fixation of the stent graft or is entirely absent, thus making it problematic to exclude the aneurysm from the blood flow by means of classic endoprosthetic repair. For this reason, in order to preserve the blood flow through visceral and renal arteries fenestrated endoprostheses are used as alternative minimally invasive treatment policy. Described herein is the first in the Russian Federation clinical case of using a fenestrated endovascular graft for treatment of a juxtarenal aortic aneurysm. Our patient had high surgical risk due to severe concomitant pathology and was therefore subjected to implantation of a fenestrated endoprosthesis with the preservation of the blood flow through the superior mesenteric artery and both renal arteries. The operation was successful with the complete exclusion of the aneurysm from the blood flow. The first and subsequent controls in the postoperative period showed an adequate position of the endoprosthesis and normal blood flow through the visceral branches.

[A clinical case of endovascular prosthetic repair of a gigantic abdominal aorta aneurysm].

To illustrate the present-day possibilities in treatment of aortic dissection we describe herein a clinical case report concerning successful prosthetic repair of a gigantic aneurysm of the infrarenal portion of the aorta with the Gore Excluder using an endovascular surgical approach in a patient running high risk associated with difficult anatomy of the abdominal portion of the aorta, iliac arteries, and accompanying diseases (left lung cancer, CAD, critical stenosis of the RCA. This was followed by balloon angioplasty with stenting of the RCA with Lekton stents with a good angiographic result. EVAR has become an alternative to the conventional open surgery with lower risk of complications, shorter hospital stay, and decreased mortality rate, which was confirmed by the findings of international studies.

[Multislice spiral computed tomography in the planning of transcatheter aortic valve replacement].

Surgical treatment for aortic valve (AV) pathology is an urgent and important problem of modern medicine. The prevalence of valve disease is great and remains steadily high in the population. Due to a large number of patients who cannot undergo open AV surgery, alternative hybrid treatments are recently being actively improved. Multislice spiral computed tomography (MSCT) is mandatory prior to transcatheter AV replacement as the examination results determine if a hybrid treatment can be performed and the access is transfemoral or transapical. MSCT provides the data necessary to determine the sizes and types of AV prostheses. The application of the current systems of 320-640 spiral tomographs will further improve MSCT as the method of choice in examining patients before transcatheter AV replacement.

[Hybrid surgical management of a saccular aneurysm of the aortic arch].

The present article aims to describe a clinical case of hybrid surgical intervention consisting in complete prosthetic repair of the aortic arch in a high-risk male patient diagnosed with a gigantic saccular aneurysm of the aortic arch. The patient was subjected to a hybrid operation--an operation of endovascular prosthetic repair of the thoracic portion of the aorta with the Gore Tag stent graft in a combination with bypass grafting of the left common carotid and left subclavian arteries with the Gore bifurcated stent graft, autovenous aortocoronary bypass grafting of the CA without artificial circulation. The postoperative period was uneventful with the patient's favourable convalescence and rehabilitation occurring within the shortest terms possible. According to the findings of MSCT-aortography, fulfilment of the arteries of the aortic arch with contrast medium was satisfactory. The residual cavity of the aneurysm was completely isolated from the blood flow, with no endoleak. The arteries of the aortic arch were opacified through the bifurcation prosthesis from the ascending portion of the aorta. Hybrid surgical interventions appear to possess all positive properties of endovascular (according to the findings of the EVAR1 and EVAR2 Trials) and traditional open surgery, thus allowing of both avoiding threatening complications and minimizing the terms of rehabilitation. This technique might thus be considered a useful tool to be included into the basic armamentarium of the vascular surgeon as an option of revascularization.