Role of CT attenuation correction gated SPECT MPI in prediction of pulmonary hypertension.

OBJECTIVE: To elucidate the value of gated SPECT-MPI using CT attenuation correction (AC) for prediction of pulmonary hypertension (PHT) in coronary patients by estimation of reliability of non-contrast CT in measurement of main pulmonary artery diameter (MPAd) as well as by assessment of potential predictive role of gated parameters as beneficial accessory findings. BACKGROUND: Contrast-enhanced CT is known as an accurate tool for assessment of MPAd to predict PHT. [1] The low-dose non-contrast CT which is used for AC in MPI study, however, has an unclear value in precise vascular diameter measurement; it is also uncertain whether gated parameters could help to predict PHT. METHODS AND PATIENTS: A total of 207 patients, who had a transthoracic echocardiography and MPI with an interval of maximum one month, underwent this retrospective study. PHT was defined as a RVSP ≥36 mmHg by echocardiography; peak tricuspid regurgitation velocity (PTRV) was also calculated to use as a criterion for PHT. Of all subjects, 120 had RVSP ≥ 36 and 87 showed RVSP < 36; there also were 191 and 16 patients with PTRV ≤ 3.4 m/s and >3.4 m/s, respectively. Comparison was made unconnectedly between each group regarding the echocardiography results with the MPI parameters, with and without CT-AC, including MPAd derived from CT as well as RV/LV uptake ratio, shape index and septal wall motion and thickening scores to define the best indicators of PHT. RESULTS: There was a significant association between established benchmark of PHT in echocardiography (RVSP), with MPAd derived from non-contrast CT as well as with LV shape index from gated study and RV/LV uptake ratio acquired from non-AC SPECT-MPI. Also, stress and rest RV/LV uptake ratio, MPAd, LV end-systolic and LV end-diastolic shape indexes are significantly higher in patients with RVSP ≥ 36 mmHg compare to patients with RVSP < 36 mmHg. CONCLUSIONS: Gated-SPECT-MPI using CT-AC can predict PHT by reliable estimation of MPAd as well as by defining RV/LV uptake ratio and shape index, providing an added clinical value for this invaluable modality in cardiac patients.

Increased prevalence of thyroid dysfunction in Tehran - HAMRAH study.

BACKGROUND: The aim of the current study is to assess the prevalence of different categories of thyroid dysfunction and their associated risk factors among the modern urban population of Tehran, the capital of Iran. METHODS: The present investigation is a sub-study of the HAMRAH study, a population-based prospective study designed to assess the prevalence of traditional cardiovascular risk factors and their changes through a 10-year follow-up. 2228 (61% female) adults aged between 30 and 75 years old and with no overt cardiovascular diseases were selected through a multistage cluster randomized sampling. Blood levels of thyroid-stimulating hormone (TSH), thyroxin (T4), and triiodothyronine (T3) were measured with the aim of assessing the prevalence of abnormal thyroid function status among the modern urban Iranian population, and in order to report the total prevalence of participants with clinical hypo- or hyperthyroidism, the number of individuals taking thyroid-related drugs were added to the ones with overt thyroid dysfunction. A subgroup analysis was also performed to determine the associated risk factors of thyroid dysfunction. RESULTS: The prevalence of thyroid dysfunction among the total population was 7% (95%CI: 5.9 - 8%) and 0.4% (95% CI: 0.1 - 0.6%) for subclinical and overt hypothyroidism, and 1.6% (95% CI: 1 - 2%) and 0.2% (95% CI: 0 - 0.3%) for subclinical and overt hyperthyroidism, respectively. Clinical thyroid dysfunction was detected in 10.3% of the study population (9.4% had clinical hypo- and 0.9% had clinical hyperthyroidism). In the subgroup analysis, thyroid dysfunction was significantly more prevalent among the female participants (P-value = 0.029). CONCLUSIONS: In the current study, the prevalence of different categories of abnormal thyroid status, and also the rate of clinical hypo- and hyperthyroidism was assessed using the data collected from the first phase of the HAMRAH Study. In this study, we detected a higher prevalence of clinical and subclinical hypothyroidism among the Iranian population compared to the previous studies.

Percutaneous Transcatheter Closure of Post-Myocardial Infarction Ventricular Septal Rupture.

Post-myocardial infarction ventricular septal rupture is the most catastrophic mechanical complication with high morbidity and mortality, reaching 94% in patients treated conservatively and 47% in patients undergoing cardiac surgery procedures (30-day mortality). In this review article we tried to review trans-catheter closure approach and explain elaborately device selection based on real-world patients in this fatal complication.

The Treatment Dilemma of Arteriopathy in Takayasu Arteritis- A State-of-the-Art Approach.

Takayasu Arteritis (TA) is a chronic idiopathic granulomatous pan-arteritis affecting the pulmonary artery, the aorta, and its principal derived branches. The majority of TA patients are female (82.9%-97.0%). Due to the inflammatory character of the illness, arterial stenosis therapy must be treated differently than the atherosclerosis process. In this review paper, we outline a strategy using real-world challenging cases.

Prevalence and associated factors of chronic venous disease among the modern Iranian urban population.

OBJECTIVES: Chronic venous disease (CVD) of the lower extremities is one of the common venous diseases in different populations, with a wide range of clinical manifestations and undetermined exact prevalence owing to different population characteristics and measurement methods. This study aimed to estimate the prevalence of CVD among the modern Iranian urban population and determine its associated risk factors. METHODS: The Heart Assessment and Monitoring in Rajaie Hospital study, a longitudinal population-based cohort, aims to investigate the baseline prevalence and the 10-year incidence of cardiovascular diseases and associated risk factors in the adult population aged 30 to 75 years with no overt cardiovascular diseases in Tehran. Two instructed interventional cardiologists performed CVD evaluation using the Clinical-Etiology-Anatomy-Pathophysiology classification. CVD was graded as C1 to C6, and chronic venous insufficiency (CVI) as C3 to C6. A multivariable regression model was used to analyze the association between CVD and prespecified covariates of age, sex, body mass index (≥30 kg/m2), smoking, hypertension, diabetes mellitus, physical activity, dyslipidemia, and delivery method. RESULTS: CVD prevalence among 1176 participants was 36.5% (95% confidence interval [CI], 33.8-39.3) and was higher in women than men (44.2% vs 23.5%). CVI prevalence was only 0.7% (95% CI, 0.3-1.3). Multivariable analysis showed that advanced age (odds ratio [OR], 1.06; 95% CI, 1.04-1.08), female sex (OR, 2.98; 95% CI, 2.14-4.14), and body mass index of ≥30 (OR, 1.36; 95% CI, 1.03-1.81) were independently associated with CVD. Physical activity (OR, 0.77; 95% CI, 0.58-1.02) was nearly protective, whereas other factors, including traditional cardiovascular risk factors, had no meaningful association with CVD. CONCLUSIONS: Our findings showed that CVD was prevalent in the modern Iranian urban population. However, considering the very low prevalence of the higher stages of the disease, the benefit of mass screening is debatable, and better risk discriminators should be investigated.

Current Endovascular Approach in Adult Patients with Pulmonary Vein Stenosis: A State-of-the-Art Approach.

Regarding to more invasive treatment of atrial arrhythmia (atrial fibrillation ablation) and pulmonary vein isolation (PVI), the rate of acquired pulmonary vein stenosis (PVS) is increasing and at present, PV ablation for AF has become the principal cause of PVS in adult patients. On the other way, by improvement in procedural techniques, equipment, and the experience of the operators, the incidence of PVS has been decreased. There is some controversy about the manner of follow-up of these patients and in most centers, just symptomatic patients are considered for imaging and treatment. Almost always, those with PV stenosis more than 70% or multiple PV involvement become symptomatic and if give them up without treatment, pulmonary symptoms and finally irreversible pulmonary hypertension will occurred. So, intensive pursue after the procedure is highly recommended. Whereas in pediatric patients with congenital or acquired PVS, the best treatment approach is surgery, in adult patients, the preferred type of treatment is the transcatheter intervention with high acute success rate. In this present review, we have scrutinized about the diagnostic modalities, the indications for intervention, the diverse treatment strategies, and principally clarify an accurate stepwise approach during transcatheter procedure.

Diverse Transcatheter Closure Strategies in Coronary Artery Fistulas A State-of-the-Art Approach.

Coronary artery fistulas (CAFs) are accounted as the most congenital coronary anomalies. As their natural course is progressive dilatation of the feeder arteries and the fistula tract, so, catastrophic complications are frequently illustrated by aging. Even in those with asymptomatic small fistulas, close follow-up is mandatory to prevent subsequent sequelas. In patients with medium or large-sized fistulas, irrespective of symptoms, closure (either by surgical ligation or transcatheter closure) is recommended. In the current era of advances in the equipment and devices and also innovations in percutaneous closure techniques and preprocedural imaging, TCC is now regarded as the preferred strategy for CAF closure except in some high-risk cases. So, by appropriate case selection modalities, pre-procedural planning, and determining the closure techniques, recent small case-series studies have been reported good final angiographic and clinical results by TCC. In this article, we have introduced several transcatheter closure techniques by details; also, we have recommended more multi-center trials with long-term clinical follow-up to address the best treatment options in these patients.

The Pragmatic Role of COVID-19 on the Thrombus Grade of Patients with Contemporary ST-Segment-Elevation Myocardial Infarction.

Background: Limited data exist on the clinical outcomes of patients with coronavirus disease 2019 (COVID-19) presenting with ST-segment-elevation myocardial infarction (STEMI). Methods: This multicenter study, conducted in 6 centers in Iran, aimed to compare baseline clinical and procedural data between a case group, comprising STEMI patients with COVID-19, and a control group, comprising STEMI patients before the COVID-19 pandemic, and to determine in-hospital infarct-related artery thrombus grades and major adverse cardio-cerebrovascular events (MACCEs), defined as a composite of deaths from any cause (cardiovascular and noncardiovascular), nonfatal strokes, and stent thrombosis. Results: No significant differences were observed between the 2 groups regarding baseline characteristics. Primary percutaneous coronary intervention (PPCI) was performed in 72.9% of the cases and 98.5% of the controls (P=0.043), and primary coronary artery bypass grafting was performed in 6.2% of the cases and 1.4% of the controls (P=0.048). Successful PPCI procedures (final TIMI flow grade III) were significantly fewer in the case group (66.5% vs 93.5%; P=0.001). The baseline thrombus grade before wire crossing was not statistically significantly different between the 2 groups. The summation of thrombus grades IV and V was 75% in the case group and 82% in the control group (P=0.432). The rate of MACCEs was 14.5% and 2.1% in the case and control groups, respectively (P=0.002). Conclusion: In our study, the thrombus grade had no significant differences between the case and control groups; however, the in-hospital rates of the no-reflow phenomenon, periprocedural MI, mechanical complications, and MACCEs were statistically significantly higher in the case group.

The treatment dilemma in adult patients with peripheral pulmonary artery stenosis of diverse etiologies.

BACKGROUND: Peripheral pulmonary artery stenosis (PPAS) is a rare and underdiagnosed phenomenon that is reported infrequently in adult patients. Most patients with PPAS have concomitant congenital heart diseases, a history of palliative surgical therapies during childhood, or syndromic characteristics. Acquired cases are rare, and they are underestimated in adulthood and managed inappropriately. CASE PRESENTATION: This case series describes 3 adult patients with PPAS of diverse etiologies and discusses their underlying causes, diagnostic modalities, and treatment strategies. CONCLUSIONS: In patients with PPAS, sufficient heed should be paid to endovascular interventions such as balloon dilation and primary or bailout stenting, not least vis-à-vis the type and size of balloons or stents as well as complications and preventive strategies.

Effects of the COVID-19 Pandemic on the Management of Patients With ST-elevation Myocardial Infarction in a Tertiary Cardiovascular Center.

BACKGROUND: In the Coronavirus Disease 2019 (COVID-19) pandemic, the appropriate reperfusion strategy in patients with ST-segment elevation myocardial infarction (STEMI) is unclear. METHODS: This retrospective single-center study consecutively enrolled patients who presented with STEMI and scheduled for primary percutaneous coronary intervention (PPCI) during the outbreak of COVID-19. Due to the delay in the reporting of the polymerase chain reaction test results, our postprocedural triage regarding COVID-19, followed by the isolation strategy, was based on lung computerized tomography scan results. RESULTS: Forty-eight patients with STEMI referred to our center. PPCI was done for 44 (91%) of these patients. The mean symptom-to-device time was 490.93 ± 454.608 minutes, and the mean first medical contact-to-device time was and 154.12 ± 36.27 minutes. Nine (18%) patients with STEMI were diagnosed as having typical/indeterminate features indicating COVID-19 involvement. During hospitalization, 1 (2.0%) patient died of cardiogenic shock. The study population was followed for 35.9 ± 12.7 days. Two patients expired in another centers due to COVID-19. No cardiac catheterization laboratory staff members were infected by COVID-19 during the study period. CONCLUSIONS: Our small report indicates that by taking the recommended safety measures and using appropriate PPE, we can continue PPCI as the main reperfusion strategy safely and effectively.

Warning signals of elevated prediabetes prevalence in the modern Iranian urban population.

BACKGROUND: We sought to estimate the prevalence of diabetes mellitus (DM) and pre-DM and their associated factors among a sample of the Iranian urban population between 2017 and 2019. METHODS: The present investigation is a sub-study on the HAMRAH cohort study, a longitudinal population-based cohort study to assess the 10-year risk of cardiovascular diseases and their related risk factors in the adult population of the Iranian capital, Tehran. Via a multistage cluster randomized sampling method, 2123 adults aged between 30 and 75 years who had no history of cardiovascular diseases were selected for the study. With the aid of the 2010 American Diabetes Association criteria for the definition of DM and pre-DM, age and sex-specific prevalence rates were estimated. RESULTS: The estimated overall prevalence of DM was 14.3% (95% CI: 13.1%-15.8%): 10.4% known DM (95% CI: 9.1%-11.8%) and 4% newly diagnosed DM (95% CI: 3.1%-5.1%). Pre-DM was detected in about 29.2% of the study participants (95% CI: 22.9-36.3%). Our logistic regression analysis revealed that increasing age, higher systolic blood pressure, higher levels of triglycerides, and lower levels of high-density lipoprotein were significantly associated with DM. CONCLUSIONS: DM and pre-DM follow a notable incremental pattern among the Iranian urban population. This finding underscores the significance of the need to improve prevention and screening strategies in the Iranian urban population.

Does the novel coronavirus 2019 like heart more than the other family members of coronaviruses?

The disaster due to the novel coronavirus disease 2019 (COVID-19) around the world has made investigators enthusiastic about working on different aspects of COVID-19. However, although the pandemic of COVID-19 has not yet ended, it seems that COVID-19 compared to the other coronavirus infections (the Middle East Respiratory Syndrome [MERS] and Severe Acute Respiratory Syndrome [SARS]) is more likely to target the heart. Comparing the previous presentations of the coronavirus family and the recent cardiovascular manifestations of COVID-19 can also help in predicting possible future challenges and taking measures to tackle these issues.

Cardiovascular patients in COVID-19 era, a case series, an experience from a tertiary cardiovascular center in Tehran, Iran.

Different cardiovascular presentations of coronavirus disease 2019 can be seen because of the systemic involvement. Considering its new presentations, there is need for further studies regarding the mechanistic pathways involved.