| 1. |
- Birgander, Mats, et al.
(författare)
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Adrenergic and cardiac dysfunction in primary hyperparathyroidism.
- 2012
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Ingår i: Clinical Endocrinology. - : Wiley. - 1365-2265 .- 0300-0664. ; 76, s. 189-195
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Tidskriftsartikel (refereegranskat)abstract
- Objective: Primary hyperparathyroidism (PHPT) is associated with cardiovascular morbidity and premature death but the underlying mechanisms are incompletely understood. The aim of this study was to investigate if adrenergic dysfunction may be a contributing factor. Patients and methods: Forty-nine patients with mild PHPT (serum calcium 2.7 ± 0.1 mmol/L) and 48 control subjects, matched for age and sex, were examined; patients within 1 month before parathyroidectomy (PTX) and 6 months postoperatively; control subjects at inclusion. Heart rate variability (HRV) was analyzed in 24-hour electrocardiograms, and plasma concentrations of epinephrine and norepinephrine were measured at rest and immediately after standardized physical tests. Results: At baseline, the patients showed, compared to the controls, reduced stress-related increase of circulating epinephrine (P < 0.05) and norepinephrine (P < 0.05). No significant change was observed 6 months after PTX. At baseline, there were no significant differences between patients and controls in HRV or heart rate but 6 months after curative PTX, the patients showed significantly reduced HRV in both frequency and time domain, and their maximum and average heart rate had decreased (P = 0.011 and P = 0.018, respectively). The patients with the highest preoperative levels of circulating parathyroid hormone showed the greatest changes in heart rate and HRV postoperatively. Conclusions: This study demonstrates a previously unknown impairment of catecholamine response to physical stress in PHPT along with changes of HRV, also indicating adrenergic dysfunction. These factors should be considered in the ongoing controversy regarding the management of patients with mild "asymptomatic" PHPT.
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| 2. |
- Birgander, Mats, et al.
(författare)
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Cardiac Structure and Function Before and After Parathyroidectomy in Patients With Asymptomatic Primary Hyperparathyroidism
- 2009
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Ingår i: The Endocrinologist. - 1539-9192. ; 19:4, s. 154-158
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Tidskriftsartikel (refereegranskat)abstract
- Background: Primary hyperparathyroidism (PHPT) is associated with cardiac disease and increased risk of all-cause and cardiovascular mortality. We investigated cardiac structural and functional parameters before and after successful parathyroidectomy in asymptomatic PHPT patients. Methods and Results: Forty-nine PHPT patients (age: 62.9 +/- 11 years, 5 men) and 48 healthy control subjects, matched for age, sex and smoking status were enrolled in the study. PHPT patients were examined preoperatively and 6 and 12 months postoperatively. Structural and functional cardiac parameters were assessed by transthoracic echocardiography. One year after parathyroidectomy left ventricular (LV) mass, left atrial size, LV enddiastolic and endsystolic diameters, LV posterior wall and interventricular septum diameter, and right ventricular enddiastolic diameter were all increased in PHPT patients, although not significantly. As an indication of worsened LV diastolic function, the heart rate adjusted Doppler-derived deceleration time of the transmittal E-wave increased among PHPT patients (276 +/- 82-303 +/- 54 milliseconds, P = 0.004). There was also deterioration of LV ejection fraction (from 62.7 +/- 7 to 59.9 +/- 7.8%, P = 0.868) and mean atrioventricular plane displacement (from 13.2 +/- 2 to 12.6 +/- 2 mm, P = 0.029). Conclusion: There were no significant differences in heart function between hyperparathyroid and control subjects, and 6 months after parathyroidectomy, there was no change in heart function in hyperparathyroid subjects.
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| 3. |
- Birgander, Mats
(författare)
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Cardiovascular disease and adrenergic dysfunction in mild primary hyperparathyroidism
- 2011
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Primary hyperparathyroidism (PHPT) is associated with cardiovascular morbidity and premature death, but the underlying mechanisms are incompletely understood. The aim of this thesis was to investigate cardiovascular parameters and adrenergic function in mild PHPT compared to healthy controls subjects before and after curative parathyroidectomy (PTX). Forty-nine patients with mild PHPT (serum calcium 2.7 ± 0.1 mmol/L) and 48 control subjects, matched for age and sex, were examined; patients before PTX and up to 1 year postoperatively; control subjects at inclusion. Examinations comprised 24-hour ambulatory blood pressure (BP) measurements, 24-hour electrocardiogram with Holter monitoring, and echocardiography and measurements of circulating catecholamines at rest and after physical stress. At baseline, the patients showed signs of structural and functional heart disturbances and reduced catecholamine response to physical stress, which had not normalized at follow-up 6 months after PTX. The patients also showed signs of impaired heart rate variability (HRV). This, however, normalized after PTX. Patients being treated for hypertension showed an increase in BP after PTX, whereas BP decreased in normotensive patients. Echocardiographic, HRV-related and adrenergic parameters correlated with preoperative serum levels of PTH, contrary to hypertension. The results demonstrate reversible impairment of HRV and a previously unknown adrenergic dysfunction in PHPT, as well as the first clinical evidence of a chronotropic PTH effect. The results also demonstrate a hitherto unknown risk of BP increase after PTX in PHPT patients on antihypertensive treatment. These factors should be considered in the ongoing controversy regarding the management of patients with mild, so-called “asymptomatic” PHPT.
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| 4. |
- Birgander, Mats, et al.
(författare)
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Postexercise Cardiac Performance Among Patients With Mild Primary Hyperparathyroidism
- 2009
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Ingår i: The Endocrinologist. - 1539-9192. ; 19:6, s. 263-266
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Tidskriftsartikel (refereegranskat)abstract
- Primary hyperparathyroidism (pHPT) is associated with cardiac disease. This prospective study was designed to investigate changes in cardiac function before and after parathyroidectomy. Resting and post exercise cardiac function was compared with matched control subjects. Fifty patients (mean age 62.9 +/- 11 years, 45 women) and 50 healthy control subjects, matched for age and sex were studied. Resting and postmaximum exercise echocardiography/Doppler examination were performed at baseline and 6 months after parathyroidectomy. pHPT patients were tested at baseline and 6 months postoperatively. Control subjects were tested only at baseline. Patients were divided into 4 subgroups based on median preoperative levels of PTH and calcium (Ca): high (up arrow) PTI4/ up arrow Ca, up arrow PTH/low (down arrow) Ca, up arrow Ca/ down arrow PTH, and down arrow PTH/ down arrow Ca. No significant difference between pHPT patients and control subjects regarding post exercise systolic function were detected, There was a tendency of lowed E/A among pHPT patients which was significant in subgroup down arrow PTH/ down arrow Ca (1.07 +/- 0.3). Subgroup up arrow PTH/ up arrow Ca showed a lower S/D compared with control subjects at baseline (1.28 +/- 0.3 vs. 1.48 +/- 0.3, P = 0.029). No significant changes regarding post exercise echocardiographic parameters reflecting cardiac function were detected 6 months after parathyriodectomy. Patients with asymptomatic pHPT showed a tendency of elevated filling pressures and signs of impaired diastolic function during exercise.
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| 5. |
- Birgander, Mats, et al.
(författare)
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Relationship Between Mild Primary Hyperparathyroidism and Left Ventricular Structure and Diastolic Performance
- 2009
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Ingår i: The Endocrinologist. - 1539-9192. ; 19:4, s. 187-191
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Forskningsöversikt (refereegranskat)abstract
- Aim: This study aims to investigate cardiac structure and function in patients with asymptomatic primary hyperparathyroidism (pHPT) and if there is any relation to severity regarding serum levels of calcium (Ca) and parathyroid hormone. Methods and Results: We consecutively included 50 patients (mean age 62.9 +/- 11 years, 45 women) with clinically diagnosed pHPT. We prospectively recruited 50 healthy control subjects, matched for age and sex. Standard transthoracic echocardiographic examination was performed using the 4 standard views and structural parameters as well as left ventricular (LV) systolic and diastolic function was determined. Mean LV ejection fraction and atrioventricular plane displacement were on average normal and did not differ between patients and controls. However, pHPT patients had significantly greater LV mass (148 +/- 37 vs. 127 +/- 29 g, P = 0.002), LV end diastolic area (81 +/- 20 vs. 68 +/- 18 cm(2), p = 0.003), LV posterior wall diameter (8.9 +/- 1 vs. 8.1 +/- 1 min, P = 0.006), and LA size (21 +/- 3 vs. 19 +/- 2 mm, P < 0.001). A moderate to severe LV diastolic filling impairment was present in substantially more pHPT patients, compared with control subjects (36% vs. 4%, P < 0:001). Conclusion: Patients with asymptomatic pHPT showed LV structural changes and impaired LV diastolic function.
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| 6. |
- Escaned, Javier, et al.
(författare)
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Safety of the Deferral of Coronary Revascularization on the Basis of Instantaneous Wave-Free Ratio and Fractional Flow Reserve Measurements in Stable Coronary Artery Disease and Acute Coronary Syndromes
- 2018
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Ingår i: JACC. - : Elsevier. - 1936-8798 .- 1876-7605. ; 11:15, s. 1437-1449
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES The aim of this study was to investigate the clinical outcomes of patients deferred from coronary revascularization on the basis of instantaneous wave-free ratio (iFR) or fractional flow reserve (FFR) measurements in stable angina pectoris (SAP) and acute coronary syndromes (ACS). BACKGROUND Assessment of coronary stenosis severity with pressure guidewires is recommended to determine the need for myocardial revascularization. METHODS The safety of deferral of coronary revascularization in the pooled per-protocol population (n = 4,486) of the DEFINE-FLAIR (Functional Lesion Assessment of Intermediate Stenosis to Guide Revascularisation) and iFR-SWEDEHEART (Instantaneous Wave-Free Ratio Versus Fractional Flow Reserve in Patients With Stable Angina Pectoris or Acute Coronary Syndrome) randomized clinical trials was investigated. Patients were stratified according to revascularization decision making on the basis of iFR or FFR and to clinical presentation (SAP or ACS). The primary endpoint was major adverse cardiac events (MACE), defined as the composite of all-cause death, nonfatal myocardial infarction, or unplanned revascularization at 1 year. RESULTS Coronary revascularization was deferred in 2,130 patients. Deferral was performed in 1,117 patients (50%) in the iFR group and 1,013 patients (45%) in the FFR group (p < 0.01). At 1 year, the MACE rate in the deferred population was similar between the iFR and FFR groups (4.12% vs. 4.05%; fully adjusted hazard ratio: 1.13; 95% confidence interval: 0.72 to 1.79; p = 0.60). A clinical presentation with ACS was associated with a higher MACE rate compared with SAP in deferred patients (5.91% vs. 3.64% in ACS and SAP, respectively; fully adjusted hazard ratio: 0.61 in favor of SAP; 95% confidence interval: 0.38 to 0.99; p = 0.04). CONCLUSIONS Overall, deferral of revascularization is equally safe with both iFR and FFR, with a low MACE rate of about 4%. Lesions were more frequently deferred when iFR was used to assess physiological significance. In deferred patients presenting with ACS, the event rate was significantly increased compared with SAP at 1 year. (C) 2018 The Authors. Published by Elsevier on behalf of the American College of Cardiology Foundation.
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| 7. |
- Mohammad, Moman A., et al.
(författare)
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Trends in Clinical Practice and Outcomes After Percutaneous Coronary Intervention of Unprotected Left Main Coronary Artery
- 2022
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Ingår i: Journal of the American Heart Association. - : John Wiley & Sons. - 2047-9980. ; 11:7
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The use of percutaneous coronary intervention (PCI) to treat unprotected left main coronary artery disease has expanded rapidly in the past decade. We aimed to describe nationwide trends in clinical practice and outcomes after PCI for left main coronary artery disease. METHODS AND RESULTS: Patients (n=4085) enrolled in the SCAAR (Swedish Coronary Angiography and Angioplasty Registry) as undergoing PCI for left main coronary artery disease from 2005 to 2017 were included. A count regression model was used to analyze time-related differences in procedural characteristics. The 3-year major adverse cardiovascular and cerebrovascular event rate defined as death, myocardial infarction, stroke, and repeat revascularization was calculated with the KaplanMeier estimator and Cox proportional hazard model. The number of annual PCI procedures grew from 121 in 2005 to 589 in 2017 (389%). The increase was greater for men (479%) and individuals with diabetes (500%). Periprocedural complications occurred in 7.9%, decreasing from 10% to 6% during the study period. A major adverse cardiovascular and cerebrovascular event occurred in 35.7% of patients, falling from 45.6% to 23.9% (hazard ratio, 0.56; 95% CI, 0.41–0.78; P=0.001). Radial artery access rose from 21.5% to 74.2% and intracoronary diagnostic procedures from 14.0% to 53.3%. Use of bare-metal stents and first-generation drug-eluting stents fell from 19.0% and 71.9%, respectively, to 0, with use of new-generation drugeluting stents increasing to 95.2%. CONCLUSIONS: Recent changes in clinical practice relating to PCI for left main coronary artery disease are characterized by a 4-fold rise in procedures conducted, increased use of evidence-based adjunctive treatment strategies, intracoronary diagnostics, newer stents, and more favorable outcomes.
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| 8. |
- Rydberg, Erik, et al.
(författare)
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Effect of successful parathyroidectomy on 24-hour ambulatory blood pressure in patients with primary hyperparathyroidism.
- 2010
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Ingår i: International Journal of Cardiology. - : Elsevier BV. - 0167-5273. ; 142, s. 15-21
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: The pathogenesis of hypertension in patients with primary hyperparathyroidism (PHPT) is unclear, and the prevailing opinion is that parathyroidectomy does not affect the blood pressure (BP). Most previous studies have been based on BP measurements at rest in a clinical setting. The aim of this study was to get additional information by 24-hour ambulatory measurements. DESIGN AND PATIENTS: Forty-nine consecutive patients with PHPT (age 63+/-12 years, 44 women) were examined before and 6 months after curative parathyroid surgery. MEASUREMENTS: Serum concentrations of calcium and PTH, and 24-hour ambulatory mean, minimum, and maximum systolic (S) and diastolic BP, and mean arterial BP. RESULTS: On average, the patients showed no BP change after parathyroidectomy. However, those with a history of hypertension (n=20) showed generally increased BP values after parathyroidectomy, with significantly increased minimum and average SBP (P=0.02 and P=0.04, respectively), whereas patients without a history of hypertension (n=29) showed unchanged or slightly reduced BP values after parathyroidectomy, with significantly decreased maximum SBP (P=0.04). Serum concentrations of PTH and calcium were not significantly related to any of the BP variables measured. CONCLUSIONS: The novel finding that patients with both PHPT and hypertension may show increased BP after parathyroidectomy warrants intensified BP control postoperatively in these patients, and motivates early treatment of PHPT in order to prevent the development of complicating hypertension.
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