Antiarrhythmic therapy for narrow QRS supraventricular tachyarrhythmias in newborns and infants in the first year of life: Potent tools to be handled with care.

Supraventricular tachyarrhythmias pose a significant challenge in neonates and infants, particularly within the first year of life, where prompt and effective management is crucial. By synthesizing available evidence and clinical experience, this review aims to provide a comprehensive overview of antiarrhythmic therapy in this vulnerable population, with a focus on narrow QRS supraventricular tachyarrhythmias. This review examines the current understanding of supraventricular tachyarrhythmia management and discusses the challenges associated with antiarrhythmic therapy in newborns and infants during the critical first year of life, evaluating the efficacy and safety of various antiarrhythmic agents commonly utilized in this population, including dosing considerations, adverse effects, and strategies for acute management and prophylactic long-term antiarrhythmic treatment.

Implantable Loop Recorder with Long Sensing Vector: Safety, Acceptability, and Sensing Performance in Pediatric Patients.

Implantable loop recorders (ILRs) are effective tools for detecting arrhythmias by long-term continuous heart rhythm monitoring. Benefits have been demonstrated even in pediatric patients. ILR with a long sensing vector has recently been designed to improve signal quality in terms of P wave visibility and R wave amplitude. However, there are no data on its use in pediatric patients. We considered a series of pediatric patients implanted with a long sensing vector ILR. Sensing performance, including R wave amplitude and P wave visibility, device-related complications, and diagnostic yield were collected. During follow-up, each patient guided by his/her parents/guardians was also asked to complete a brief questionnaire to assess patient acceptability of the device. Twenty-five consecutive pediatric patients (mean age 11.3 ± 3.5 years, 72% male) were enrolled. The insertion success rate was 100% on the first attempt with no complications. The median amplitude of the R wave was 1.15 mV (interquartile range, 1.01-1.42) with no significant differences between patients aged ≤ or > 10 years (p = 0.726) and between female and male (p = 0.483). P wave was classified as 'always visible' in 24/25 patients (96%). ILR was generally well accepted and tolerated by all involved patients. During a median follow-up of 297 days (117-317), we achieved in 5 patients a correlation between symptoms and rhythm disorders (20%) and ruled out significant arrhythmias in 6 symptomatic children (24%). Long sensing vector ILR showed to be well accepted, with good signal quality and an excellent safety profile even in pediatric patients.

Calorie restriction prevents diet-induced insulin resistance independently of PGC-1-driven mitochondrial biogenesis in white adipose tissue.

Calorie restriction (CR) exerts remarkable, beneficial effects on glucose homeostasis by mechanisms that are not fully understood. Given the relevance of white adipose tissue (WAT) in glucose homeostasis, we aimed at identifying the main cellular processes regulated in WAT in response to CR in a pathologic context of obesity. For this, a gene-expression profiling study was first conducted in mice fed ad libitum or subjected to 40% CR. We found that the gene network related to mitochondria was the most highly upregulated in WAT by CR. To study the role that increased mitochondrial biogenesis plays on glucose homeostasis following CR, we generated a mouse model devoid of the coactivators peroxisome proliferator-activated receptor γ coactivator 1 (PGC-1)α and PGC-1ß specifically in adipocytes. Our results show that mice lacking PGC-1s in adipocytes are unable to increase mitochondrial biogenesis in WAT upon CR. Despite a blunted induction of mitochondrial biogenesis in response to calorie deprivation, mice lacking adipose PGC-1s still respond to CR by improving their glucose homeostasis. Our study demonstrates that PGC-1 coactivators are major regulators of CR-induced mitochondrial biogenesis in WAT and that increased mitochondrial biogenesis and oxidative function in adipose tissue are not required for the improvement of glucose homeostasis mediated by CR.-Pardo, R., Vilà, M., Cervela, L., de Marco, M., Gama-Pérez, P., González-Franquesa, A., Statuto, L., Vilallonga, R., Simó, R., Garcia-Roves, P. M., Villena, J. A. Calorie restriction prevents diet-induced insulin resistance independently of PGC-1-driven mitochondrial biogenesis in white adipose tissue.

A novel veno-arteriovenous extracorporeal membrane oxygenation with double pump for the treatment of Harlequin syndrome.

OBJECTIVES: The Harlequin syndrome is a complication observed in patients receiving peripheral venoarterial extracorporeal membrane oxygenation. This condition is defined as a critical variation in the oxygen saturation between the upper and the lower part of the body deriving from a poor lung function. METHODS: Between July 2018 and November 2019, a total of 60 patients (42 men and 18 women; mean age 57.4 ± 10.0 years; range = 28-71 years) underwent peripheral venoarterial extracorporeal membrane oxygenation in our center. Harlequin syndrome was identified in eight cases (six men and two women; 13.3%) of the 60 venoarterial extracorporeal membrane oxygenation-supported patients. As a result of the Harlequin syndrome, all these patients required conversion to veno-arteriovenous extracorporeal membrane oxygenation. Control and monitoring of the blood flows of the return cannulae were performed using two centrifugal pumps, one for each inlet line, according to the patient requirements to achieve optimum hemodynamic and oxygenation. RESULTS: Mean duration of veno-arteriovenous extracorporeal membrane oxygenation support was 5.3 ± 1.4 days. Seven patients (87.5%) were switched to venovenous extracorporeal membrane oxygenation, and after 13.5 ± 2.7 days, those patients were totally weaned from extracorporeal membrane oxygenation support. One patient (12.5%) had an improvement in the pulmonary function, but the cardiac function was poor. This patient was switched to venoarterial extracorporeal membrane oxygenation, and after 10 days, the patient was completely weaned from extracorporeal membrane oxygenation support. CONCLUSION: The use of a secondary centrifugal pump to manage the blood flow directed to the internal jugular vein, in the veno-arteriovenous extracorporeal membrane oxygenation setup, allows the reduction in the risk of blood clot formation, clotting factor consumption, and pulmonary embolism when compared to the use of an external clamp.

Excessive increase in left ventricular mass identifies hypertensive subjects with clustered geometric and functional abnormalities.

BACKGROUND: Left ventricular mass (LVM) exceeding needs to sustain haemodynamic load has been termed 'inappropriate left ventricular mass'. We hypothesized that inappropriate LVM identifies hypertensive patients with clustered cardiac geometric and functional abnormalities. METHODS: For this purpose, 359 hypertensive individuals without prevalent cardiovascular disease underwent Doppler echocardiography. Observed LVM exceeding more than 28% of the value predicted for individual cardiac work, body size and sex was defined as inappropriate LVM. Concentric left ventricular geometry was defined as age-adjusted relative wall thickness (RWT) greater than 0.40. Systolic dysfunction was defined as ejection fraction less than 50% or midwall shortening less than 14.7%. Diastolic dysfunction was defined as isovolumic relaxation time (IVRT) greater than 100 ms, E-velocity deceleration time greater than 220 ms or age and heart rate-normalized early/late (E/A) ratio less than 0.66. Left ventricular hypertrophy (LVH) was defined as an LVM index greater than 49.2 g/m2.7 in men and 46.7 g/m2.7 in women. RESULTS: As expected, inappropriate LVM was associated with higher RWT, lower left ventricular systolic function, longer IVRT and prolonged E-deceleration time (all P < 0.05). Patients with inappropriate LVM had a higher prevalence of concentric geometry (65.5 versus 40.4%), systolic dysfunction (67.9 versus 47.4%) and diastolic dysfunction (46.4 versus 39%; all P < 0.001) than those with LVH. Inappropriate LVM had greater sensitivity (0.89 versus 0.54) and specificity (0.82 versus 0.62; both P < 0.01) than LVH in identifying patients with clustered left ventricular concentric geometry, systolic and diastolic dysfunction. CONCLUSIONS: Inappropriate LVM is associated with a cluster of concentric left ventricular geometry, delayed left ventricular relaxation and reduced systolic performance. Compared with LVH, inappropriate LVM is more accurate at identifying patients with clustered left ventricular geometric and functional abnormalities.

Influence of Left Ventricular Stroke Volume on Incident Heart Failure in a Population With Preserved Ejection Fraction (from the Strong Heart Study).

At a given level of left ventricular (LV) systolic function, LV pump performance (assessed by stroke index [SVi]) may differ, depending on LV size. We evaluated whether low SVi may be considered a marker of risk for incident congestive heart failure (HF), independent of LV geometry and systolic function, assessed by ejection fraction (EF) or midwall fractional shortening (MFS), in a large population-based sample with normal EF. Clinical and echocardiographic data from the second Strong Heart Study (SHS) examination, including 2,885 American Indians (59 ± 8 years; 63% women) with normal EF (EF ≥51% in men and EF ≥55% in women) and without prevalent HF or significant valve disease, were analyzed. Low SVi was defined as SVi ≤22 ml/m2.04. Low SVi was more common among men and associated with lower body mass index, systolic blood pressure, LV mass index, left atrial dimension, EF, and MFS and with higher relative wall thickness. During a mean 12-year follow-up, 209 participants developed HF and 246 had acute myocardial infarction. In Cox regression analysis, low SVi was associated with higher risk of incident HF (hazard ratio 1.38; 95% confidence interval 1.06 to 1.80), independently of age, gender, body mass index, heart rate, hypertension, prevalent cardiovascular disease, left atrial dimension index, LV mass index, LV concentric geometry, EF or MFS, and abnormal wall motion, also accounting for myocardial infarction as a competing risk event. In conclusion, in the SHS, low SVi was associated with higher incident rate of HF, independently of LV geometry and systolic function and other major confounders.

Hemodynamic Correlates of Abnormal Aortic Root Dimension in an Adult Population: The Strong Heart Study.

BACKGROUND: We evaluated the relationship of aortic root dimension (ARD) with flow output and both peripheral and central blood pressure, using multivariable equations predicting ideal sex-specific ARD at a given age and body height. METHODS AND RESULTS: We measured echocardiographic diastolic ARD at the sinuses of Valsalva in 3160 adults (aged 42±16 years, 61% women) from the fourth examination of the Strong Heart Study who were free of prevalent coronary heart disease, and we compared measured data with the theoretical predicted value to calculate a z score. Central blood pressure was estimated by applanation tonometry of the radial artery in 2319 participants. ARD z scores were divided into tertiles representing small, normal, and large ARD. Participants with large ARD exhibited greater prevalence of central obesity and higher levels of inflammatory markers and lipids (0.05

Should thiazide diuretics be given as first line antihypertensive therapy or in addition to other medications?

INTRODUCTION: The recommendation to start antihypertensive therapy with diuretics (D) might produce delay in blood pressure (BP) control and, possibly, increase cost/benefit ratio. AIM: We evaluate the effects of D in relation to the administration of other anti-hypertensive medications, in clinical practice. METHODS: General practitioners recruited 2,409 hypertensive patients with indication to antihypertensive therapy, who were randomized to start treatment with chlorthalidone (12.5-25  mg daily, group D) or any other single medications (excluding thiazides, group A). The patients have been followed for at least 2 years. RESULT: Among the 2,409 patients recruited (42.5 % women), 1,205 were randomized in group D and 1,204 in group A, of which 1,051 (or 87 %) and 1026 (or 85 %) respectively, completed the study. The number of patients in optimal BP control was similar in the two groups (65.0 vs 64.0 %; p = NS). During follow-up, the group D had prescribed a slightly greater number of medications compared to the group A who added D as second line (2.3 vs 2.1; p < 0.0001). In particular group D took more ß-blockers (27.1 vs 14.9 %; p < 0.0001) with a similar number of patients in optimal BP control (64.35 vs 63.9 %; p = NS). CONCLUSION: The beginning of antihypertensive therapy with diuretics is more often subject to the addition of one or more medications to obtain an effective blood pressure control, since the diuretic administered at the beginning of the antihypertensive regimen is only rarely associated with optimal blood pressure control.

Cardiovascular risk in relation to a new classification of hypertensive left ventricular geometric abnormalities.

OBJECTIVES: In 2010, the Dallas Heart Study proposed an upgrade of the left ventricular geometric classification proposed in 1991, by using left ventricular mass combined with end diastolic volumes, and introducing the new categories of dilated left ventricular hypertrophy (LVH). We adopted the new method to test the prognostic impact of the left ventricular geometric patterns from the new classification. METHODS: We evaluated baseline anthropometric, laboratory and echocardiographic parameters of 8848 hypertensive patients from the Campania Salute Network (53 ±â€Š12 years, 56% male), free of prevalent cardiovascular disease, valve disease and with ejection fraction ≥50%. Cut points for left ventricular mass index, relative wall thickness and left ventricular end-diastolic dimension (cm/m) were derived from our historical normal reference population. Composite cardiovascular end-points were cardiac death, fatal and nonfatal myocardial infarction and stroke. RESULTS: Independent of confounders, eccentric dilated LVH, concentric nondilated LVH and concentric dilated LVH were associated with higher cardiovascular risk (hazard ratios between 2 and 9, all P < 0.01), mostly depending on the magnitude of LVM index. A volume load was present especially in dilated forms of LVH, the extent of which was important in the determination of harmful types of left ventricular geometry. CONCLUSION: Consideration of left ventricular dilatation in the evaluation of risk related to hypertensive left ventricular geometry reveals the importance of the extent of the volume load coexisting with the typical hypertensive pressure overload. At a given normal ejection fraction, the balance between the two hemodynamic components influences the shape of left ventricular geometric adaptation, the amount of left ventricular mass and the impact on prognosis.

Development of new atherosclerotic plaque in hypertensive patients: an observational registry study from the Campania-Salute network.

BACKGROUND AND PURPOSE: Carotid atherosclerotic plaques (CAPs) can develop despite appropriate antihypertensive therapy. In this observational study, we assessed characteristics associated with risk of incident CAP in a large hypertensive registry. METHODS: We evaluated 2143 hypertensive patients without evidence of CAP. Incident CAP was censored at the time of the first ultrasound control in which CAP was detected. CAP was defined according to European Society of Hypertension/European Society of Cardiology guidelines. RESULTS: At a median follow-up period of 56.6 months, about one-third of patients (32%; N = 688) exhibited new CAP. Those patients were older, more frequently smokers, diabetic, more often with metabolic syndrome, chronic kidney disease (CKD), longer hypertension history, higher baseline SBP, pulse pressure (PP), fasting glucose, total cholesterol and triglycerides, greater left ventricular mass index, higher PP/stroke index ratio and carotid intima-media thickness (IMT; all P < 0.05). In-treatment BP control was similar in both groups. In multivariable Cox regression, CAP was predicted by older age, diabetes, smoking habit, CKD and higher value of initial IMT (all P < 0.02), independently of BP control during follow-up, antihypertensive therapy and other confounders. CONCLUSION: In this registry of treated hypertensive patients, after adjusting for age and other confounders, risk of incident CAP did not depend on BP control and type of antihypertensive therapy, whereas it was independently related to the magnitude of initial IMT, independently of significant effect of prevalent diabetes and smoking habit. These findings suggest that antihypertensive treatment strategy to stop progression of cardiovascular disease might be difficult to achieve, once target organ damage is established.

Cardiovascular ultrasound exploration contributes to predict incident atrial fibrillation in arterial hypertension: the Campania Salute Network.

BACKGROUND: Interaction of cardiovascular (CV) risk factors with structural and hemodynamic alterations as combined promoters of atrial fibrillation (AF) is not yet well studied. We designed an observational, longitudinal, retrospective study to predict risk of incident AF by combination of CV risk profile, target organ damage and therapy in hypertensive patients. METHODS AND RESULTS: We studied 7062 hypertensive patients without history of AF or prevalent CV disease, with ejection fraction (EF) of ≥50%, and no more than stage III chronic kidney disease. The patients were selected from an open registry, the Campania-Salute Network, collecting information from general practitioners and community hospitals, in the Campania Region, Southern Italy, networked with the Hypertension Center of Federico II University Hospital in Naples. The end-point of the present analysis was the detection of first episode of AF by ECG or hospital admission, at any point throughout follow-up (median 36months [IQR=10-74]). During follow-up, AF developed in 117 patients. Baseline older age, greater left atrial diameter (LAd), left ventricular mass (LVM), and intimal medial thickness (IMT) were independent predictors of AF (all p<0.0001), with no effect of CV risk factors. Beta-blockers and diuretics increased risk of incident AF; use of medications inhibiting renin-angiotensin system (RAS) reduced risk by 50% (all p<0.002). CONCLUSIONS: Older age, increased LAd, and markers of target organ damage (increased LVM and IMT), identify the hypertensive phenotype at highest risk for AF. CV risk factors do not exhibit significant, independent association. Patients on anti-RAS therapy are exposed to lower risk of incident AF.

Mitral annular calcification and incident ischemic stroke in treated hypertensive patients: the LIFE study.

Background Fibro-calcification of the mitral annulus (MAC) has been associated with increased risk of ischemic stroke in general populations. This study was performed to assess whether MAC predicts incidence of ischemic stroke in treated hypertensive patients with left ventricular hypertrophy (LVH). Methods Baseline and follow-up clinical and echocardiographic parameters were assessed in 939 hypertensive patients with electrocardiogram (ECG) LVH participating in the Losartan Intervention for Endpoint reduction in hypertension (LIFE) echocardiography substudy (66±7 years; 42% women; 11% with diabetes) who did not have aortic or mitral valve stenosis or prosthesis. Results MAC was found in 458 patients (49%). Patients with MAC were older (68±7 vs. 65±7 years); were more often women (47% vs. 37%); had higher baseline systolic blood pressure (BP) (175±14 vs. 172±15mm Hg), left atrial diameter (4.0±0.5 vs. 3.8±0.6cm), and left ventricular mass index (58±13 vs. 55±12g/m(2.7)) and included more patients with proteinuria (30% vs. 21%; all P < 0.01). During a mean follow-up of 4.8 years, 58 participants had an ischemic stroke. Risk of incident ischemic stroke was significantly related to presence of MAC (log rank = 9; P < 0.01). In multivariable Cox regression analysis models, MAC was associated with increased risk of ischemic stroke (hazard ratio = 1.78-2.35), independent of age, baseline or time-varying systolic BP, prevalence or incidence of atrial fibrillation, history of previous cerebrovascular disease, and other well-recognized confounders, such as sex, time-varying left ventricular mass, left atrial diameter, and urinary albumin/creatinine ratio (all P < 0.05). Conclusions MAC is common in treated hypertensive patients with ECG LVH and is an independent predictor of incident ischemic stroke.

Effect of bariatric surgery on left ventricular geometry and function in severe obesity.

OBJECTIVE: Weight loss improves cardiac abnormalities associated with severe obesity. We evaluated the impact of weight loss following laparoscopic gastric bypass (LGBP) on left ventricular (LV) geometry and function in obese patients. METHODS: Twenty-six patients with severe obesity (41 ± 8 years, 50% women) underwent Doppler echocardiograms before and after LGBP, to measure LV geometry, excess of LV mass relative to hemodynamic load and systolic and diastolic function. RESULTS: Pre-operatively, 85% of patients exhibited LVH, and 62% hypertension and metabolic syndrome, reflecting high cardiometabolic risk. After 8 ± 4 months of follow-up, the average weight loss was 19 ± 8%. Weight loss was significantly associated with improved metabolic parameters and reduced heart rate (-9 bpm), systolic (-11 mmHg) and diastolic (-6 mmHg) blood pressure (all p < 0.02). After surgery, there was significant reduction in relative wall thickness (0.43 ± 0.07 versus 0.39 ± 0.06), LV mass index (63 ± 14 g/m(2.7) versus 49 ± 10 g/m(2.7)) and excess of LV mass in relation to hemodynamic load (all p < 0.004). LVH remained in 54% of patients, hypertension in 23% and metabolic syndrome in 27%. Ejection fraction and Doppler indices of diastolic function did not change significantly, even after adjusting for changes in heart rate. All favorable changes in LV geometry and function were also confirmed in the subgroup with <9 month follow-up (median), whereas no further improvement could be detected in patients with longer follow-up. CONCLUSIONS: In patient with severe obesity, LV geometry and systolic function improved rapidly after LGBP, without evidence of further improvement during prolonged follow-up.

Classes of antihypertensive medications and blood pressure control in relation to metabolic risk factors.

OBJECTIVE: Metabolic syndrome (MetS) is associated with uncontrolled blood pressure (BP), despite use of aggressive therapy. This study was performed to assess whether the use of different classes of antihypertensive drugs might influence this association. METHODS: We evaluated risk of uncontrolled BP (BP ≥ 140/90 mmHg under antihypertensive treatment) at the time of the last available visit, after a mean follow-up of 5 years in 4612 hypertensive patients without prevalent cardiovascular disease (43% women, 53 ±â€Š11 years) from the Campania Salute Network. RESULTS: At the time of the first visit, prevalence of MetS was associated with 43% increased risk of follow-up uncontrolled BP, independent of significant confounders and without a significant impact of specific classes of antihypertensive medications. At the time of the last available visit, patients with MetS had more often uncontrolled BP, despite more aggressive treatment. After adjusting for demographics, risk factors and number of antihypertensive medications, risk of uncontrolled BP was reduced with increased prescription of diuretics [DRTs; odds ratio (OR) 0.73, 95% confidence interval (CI) 0.62-0.86], renin-angiotensin system blockers [RAS-blockers (Angiotensin-converting enzyme-inhibitors or angiotensin receptor blockers); OR 0.77, 95% CI 0.66-0.91] and statins (OR 0.79, 95% 0.68-0.92, all P < 0.05), without significant impact of the other classes of medications. CONCLUSION: Despite the use of increased number of medications, hypertensive patients with MetS are at higher risk of uncontrolled BP. Among classes of antihypertensive medications, increased prescriptions of DRTs, RAS-blockers and also statins decrease the probability of poor BP control.

Arterial stiffness is associated with carotid atherosclerosis in hypertensive patients (the Campania Salute Network).

BACKGROUND: Pulse pressure/stroke volume indexed to height(2.04) (PP/SVi) is a validated measure of arterial stiffness, but its relation to carotid atherosclerosis is unknown. METHODS: Clinical, echocardiographic, and carotid ultrasound data from 6,209 hypertensive patients without prevalent cardiovascular (CV) disease in the Campania Salute Network were analyzed. The population was grouped into tertiles of PP/SVi. From carotid ultrasound, peak and mean intima-media thickness (IMT) and presence of carotid plaques in the common and internal carotid arteries were reported. RESULTS: Increasing PP/SVi tertile was associated with a parallel increase in age, blood pressure, total serum cholesterol and the number of antihypertensive drugs used (all P < 0.01). Higher PP/SVi was also associated with greater peak and mean IMT (all P < 0.01), also when adjusting for age, gender, blood pressure, lipid profile, and diabetes mellitus (all P < 0.01). Similarly, compared to the lower PP/SVi tertile, the multiple adjusted prevalence ratio of carotid plaque was 7 (95% confidence interval (CI) 1-13, P < 0.03) in the middle tertile and 21 (95% CI 15-28, P < 0.0001) in the upper tertile, independently of confounders. CONCLUSION: In treated hypertensive patients participating in the Campania Salute Network, higher PP/SVi is associated with carotid atherosclerosis independent of well-known clinical confounders.

Initial left-ventricular mass predicts probability of uncontrolled blood pressure in arterial hypertension.

BACKGROUND: Left-ventricular hypertrophy (LVH) is a marker of organ damage in hypertension and helps stratifying cardiovascular risk. Initial left-ventricular mass (LVM) is also a predictor of progression to hypertension, independently of initial blood pressure (BP) and other confounders. OBJECTIVES: To evaluate whether baseline LVM can influence BP control in treated hypertension. METHODS: We evaluated risk of uncontrolled BP (>140 or 90 mmHg under at least two medications), in relation to initial LVM in 4693 hypertensive outpatients (mean age 53±11 years, 43% women, 5% diabetic), without prevalent cardiovascular disease, from the Campania Salute Network. RESULTS: Uncontrolled BP was found in 2240 patients (48%). Participants with initial LVH were more often men, older, diabetic, had higher initial BP, fasting glucose, uric acid and triglycerides, and lower heart rate (HR), high-density lipoprotein-cholesterol and glomerular filtration rate than those without LVH (all P<0.05). Of 1440 patients with initial LVH, 803 (56%) were uncontrolled at follow-up compared to 44% without LVH (P<0.0001). In multivariate analyses, odds of uncontrolled BP increased with higher baseline systolic BP [odds ratio (OR)=1.13×5 mmHg, 95% confidence interval (CI) 1.10-1.15], HR (OR=1.04×5 beats/min, 95% CI 1.01-1.07), BMI (OR=1.03×kg/m, 95% CI 1.01-1.04), LVM index (OR=1.05×5 g/m, 95% CI 1.01-1.10) and prevalence of diabetes (OR=5.22, 95% CI 3.52-7.76; all P<0.05) independently of age, sex, metabolic parameters and number of antihypertensive meds (P>0.1). Among medication classes, only angiotensin-converting enzyme inhibitors or angiotensin receptor blockers were associated with lower risk of uncontrolled BP (OR=0.83, 95% CI 0.71-0.96; P=0.01), independently of covariates. CONCLUSION: In a population of treated hypertensive patients, initial LVM is a significant predictor of uncontrolled BP, independently of major risk factors and antihypertensive therapy.

Cardiac geometry and function in diabetic or prediabetic adolescents and young adults: the Strong Heart Study.

OBJECTIVE: The aim of this study was to evaluate whether diabetes (DM) and impaired fasting glucose (IFG) were associated with early alterations in left ventricular geometry and function in a large population of adolescents and young adults independently of major confounders. RESEARCH DESIGN AND METHODS: We analyzed echocardiographic data of 1,624 14- to 39-year-old participants (mean age 26.6 ± 7.7 years; 57% female) without prevalent cardiovascular disease from the fourth Strong Heart Study examination; 179 (11%) participants had DM and 299 (18%) had IFG. RESULTS: Participants with DM and IFG were older and more often obese and hypertensive than participants with normal fasting glucose (NFG) (all P < 0.05). After adjustment for age, sex, systolic blood pressure, and body fat, diabetic and IFG participants had higher left ventricular mass index than those with NFG (41.5 ± 8.7 and 39.6 ± 9.2 vs. 35.6 ± 7.8 g/m(2.7)) and reduced stress-corrected midwall shortening (98 ± 8.6 and 99 ± 7.5 vs. 101 ± 8.5%; all P < 0.05). The prevalence of left ventricular hypertrophy was higher in DM (20%) and IFG (17%) than in NFG participants (12%; P < 0.05). Compared with the other groups, DM was also associated with higher prevalence of inappropriate left ventricular mass, concentric geometry, and more diastolic abnormalities independently of covariates (all P < 0.05). CONCLUSIONS: In a population of adolescents and young adults, DM is independently associated with early unfavorable cardiovascular phenotype characterized by increased left ventricular mass, concentric geometry, and early preclinical systolic and diastolic dysfunction; early cardiovascular alterations are also present in participants with prediabetes.

Does information on systolic and diastolic function improve prediction of a cardiovascular event by left ventricular hypertrophy in arterial hypertension?

Left ventricular (LV) mass (LVM) is the most important information requested in hypertensive patients referred for echocardiography. However, LV function also predicts cardiovascular (CV) risk independent of LVM. There is no evidence that addition of LV function significantly improves model prediction of CV risk compared with LVM alone. Thus, composite fatal and nonfatal CV or cerebrovascular events were evaluated in 5380 hypertensive outpatients (2336 women, 298 diabetics, and 1315 obese subjects) without prevalent CV disease (follow-up: 3.5+/-2.8 years). We compared 5 risk models using Cox regression and adjusting for age and sex: (1) LV mass normalized for height in meters(2.7) (LVMi); (2) LVMi, concentric LV geometry, by relative wall thickness (>0.43), ejection fraction, and transmitral diastolic pattern (by thirtiles of mitral deceleration index); (3) LVMi, LV geometry, midwall shortening, and mitral deceleration index thirtiles; (4) as No. 2 with the addition of left atrial dilatation (>23 mm); and (5) as No. 3 with the addition of left atrial dilatation. Individual hazard functions were compared using receiving operating characteristic curves and z statistics. Areas under the curves increased from 0.60 in the model with the sole LVMi to 0.62 in the others (all P values for differences were not significant). The additional information on systolic and diastolic function decreased the contribution (Wald statistics) of LVMi in the Cox model without improving the model ability to predict CV risk. We conclude that risk models with inclusion of information on LV geometry and systolic and diastolic function, in addition to LVMi, do not improve the prediction of CV events but rather redistribute the impact of individual predictors within the risk variance.

Cardiovascular and metabolic predictors of progression of prehypertension into hypertension: the Strong Heart Study.

Prehypertension (defined by the Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure) frequently evolves to hypertension (HTN) and increases cardiovascular risk. It is unclear whether metabolic and/or cardiac characteristics favor development of HTN in prehypertensive subjects. We evaluated baseline anthropometric, laboratory, and echocardiographic characteristics of 625 untreated prehypertensive participants in the Strong Heart Study, without prevalent cardiovascular disease (63% women; 22% with diabetes mellitus; mean age: 59+/-7 years) to identify predictors of the 4-year incidence of HTN. Diabetes mellitus was assessed by American Diabetic Association criteria, and a diabetes-specific definition of HTN was used. Four-year incidence of HTN was 38%. Incident HTN was independently predicted by baseline systolic blood pressure (odds ratio [OR]: 1.60 per 10 mm Hg; 95% CI: 1.30 to 2.00; P<0.0001), waist circumference (OR: 1.10 per 10 cm; 95% CI: 1.01 to 1.30; P=0.04), and diabetes mellitus (OR: 2.73; 95% CI=1.77 to 4.21; P<0.0001), with no significant effect for age, sex, hemoglobin A1c, homeostatic model assessment index, C-reactive protein, fibrinogen, low-density lipoprotein and high-density lipoprotein cholesterol, triglycerides, plasma creatinine, or urine albumin:creatinine ratio. Higher left ventricular mass index (OR: 1.15 per 5 g/m(2.7); 95% CI: 1.01 to 1.25; P=0.03) or stroke volume index (OR: 1.25 per 5 mL/m(2.04); 95% CI: 1.10 to 1.50; P=0.03) was also identified, together with baseline systolic blood pressure and the presence of diabetes mellitus, as an independent predictor of incident HTN, without an additional predictive contribution from other anthropometric, metabolic, or echocardiographic parameters (all P>0.10). Thus, progression to HTN in 38% of Strong Heart Study prehypertensive participants could be predicted by higher left ventricular mass and stroke volume in addition to baseline systolic blood pressure and prevalent diabetes mellitus.