Effect of physiological mechanical perturbations on intact human myocardial repolarization.

Abstract:

OBJECTIVE:The objective of this study was to investigate the relationship between acute decreases in right ventricular volume during Valsalva strain (with resultant changes in autonomic neural tone) and measures of local endocardial repolarization time independent of heart rate and autonomic neural tone. METHODS:Patients implanted with a stimulus to T wave (Stim-T) sensing pacemaker specially adapted to output a validate measure of beat to beat local repolarization (n = 9) performed Valsalva manoeuvers (40 mmHg for 15 s) while paced at a cycle length of 500 ms. Stim-T intervals were measured before and after autonomic blockade (Block: 0.03 mg/kg i.v. atropine +/- 0.15 mg/kg propranolol). Right ventricular end diastolic volume was estimated by simultaneous 2D-echocardiography. RESULTS:Without autonomic blockade, compared to baseline, repolarization significantly prolonged during Valsalva strain (1.1 +/- 0.7%) and shortened during release (-1.4 +/- 1.0%). After block, strain related repolarization prolongation was also observed (1.0 +/- 0.6%), with significantly less release related repolarization shortening (-0.8 +/- 0.8%) compared to pre-block (P < 0.05). Right ventricular end diastolic volume decreased during strain by 11 +/- 10 and 9 +/- 16% from baseline, pre- and post-block respectively (P < 0.05). CONCLUSION:In a chronically instrumented human model, an acute physiologic volume reduction modestly prolongs right ventricular repolarization independent of changes in rate or autonomic tone.

journal_name

Cardiovasc Res

journal_title

Cardiovascular research

authors

Nanthakumar K,Dorian P,Paquette M,Hutchison S,Andrews J,Newman D

doi

10.1016/s0008-6363(99)00261-8

subject

Has Abstract

pub_date

2000-01-14 00:00:00

pages

303-9

issue

2

eissn

0008-6363

issn

1755-3245

pii

S0008-6363(99)00261-8

journal_volume

45

pub_type

杂志文章
  • Perinatal sulfur dioxide exposure alters brainstem parasympathetic control of heart rate.

    abstract:AIMS:Sulfur dioxide (SO₂) is an air pollutant that impedes neonatal development and induces adverse cardiorespiratory health effects, including tachycardia. Here, an animal model was developed that enabled characterization of (i) in vivo alterations in heart rate and (ii) altered activity in brainstem neurons that cont...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/cvt057

    authors: Woerman AL,Mendelowitz D

    更新日期:2013-07-01 00:00:00

  • Baroreflex sensitivity in conscious rats: the influence of recording site.

    abstract::Arterial blood pressures were measured simultaneously in the thoracic and abdominal aortas in the same conscious rats. Intravenous administration of sodium nitroprusside caused a greater fall in systolic blood pressure in the abdominal aorta than in the thoracic aorta, whereas intravenous administration of methoxamine...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/20.5.379

    authors: Gardiner SM,Bennett T

    更新日期:1986-05-01 00:00:00

  • Left coronary pressure-flow relations of the beating and arrested rabbit heart at different ventricular volumes.

    abstract:OBJECTIVE:To study the effect of cardiac contraction on left coronary artery pressure-flow relations at different vascular volumes and to compare these relations in the beating heart with those in the heart arrested in systole and diastole. METHODS:Maximally vasodilated, Tyrode perfused, rabbit hearts (n = 6) with an ...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1016/s0008-6363(98)00119-9

    authors: Sipkema P,Takkenberg JJ,Zeeuwe PE,Westerhof N

    更新日期:1998-10-01 00:00:00

  • GATA4 expression is primarily regulated via a miR-26b-dependent post-transcriptional mechanism during cardiac hypertrophy.

    abstract:AIMS:GATA4 is a transcription factor that is up-regulated during cardiac hypertrophy and plays a fundamental role in myocyte growth and survival. In this study, we investigate the transcriptional vs. post-transcriptional mechanisms that are involved in regulating GATA4 in the heart during neonatal and pressure overload...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/cvs001

    authors: Han M,Yang Z,Sayed D,He M,Gao S,Lin L,Yoon S,Abdellatif M

    更新日期:2012-03-15 00:00:00

  • Downstream resistance effects of intracoronary thrombosis in the stenosed canine coronary artery.

    abstract:OBJECTIVE:The presence is well established in unstable angina of intracoronary thrombosis in a stenosed epicardial coronary artery. The effects of the thrombus formation on the distal microcirculation are however still unclear. METHODS:We adapted the Folts canine model of left circumflex coronary arterial stenosis and...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1016/s0008-6363(98)00270-3

    authors: Mansaray M,Belcher PR,Vergroesen I,Wright ZM,Hynd JW,Drake-Holland AJ,Noble MI

    更新日期:1999-04-01 00:00:00

  • Endothelin-1 induced proinflammatory markers in the myocardium and leukocytes of guinea-pigs: role of glycoprotein IIB/IIIA receptors.

    abstract:AIM:To assess whether endothelin-1 (ET-1) induces the in vivo expression of inflammatory-related proteins, namely cyclooxygenase-2 (COX-2) and tissue factor, in the myocardium and circulating leukocytes of guinea-pigs. The involvement of platelets was also analyzed. METHODS:ET-1 (0.013 microg/min) was infused to male ...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1016/s0008-6363(02)00657-0

    authors: Molero L,Farré J,García-Mendez A,Jiménez Mateos-Caceres P,Carrasco Martín C,Millás I,Navarro F,Córdoba M,Casado S,López-Farré A

    更新日期:2003-01-01 00:00:00

  • Ultrastructural uncoupling between T-tubules and sarcoplasmic reticulum in human heart failure.

    abstract:AIMS:Chronic heart failure is a complex clinical syndrome with impaired myocardial contractility. In failing cardiomyocytes, decreased signalling efficiency between the L-type Ca(2+) channels (LCCs) in the plasma membrane (including transverse tubules, TTs) and the ryanodine receptors (RyRs) in the sarcoplasmic reticul...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/cvt030

    authors: Zhang HB,Li RC,Xu M,Xu SM,Lai YS,Wu HD,Xie XJ,Gao W,Ye H,Zhang YY,Meng X,Wang SQ

    更新日期:2013-05-01 00:00:00

  • Anti-Ro52 antibody acts on the S5-pore linker of hERG to chronically reduce channel expression.

    abstract:AIMS:The human ether-a-go-go-related gene (hERG) encodes the rapidly activating delayed rectifier potassium channel (IKr). Malfunction of hERG/IKr is the primary cause of acquired long QT syndrome (LQTS), an electrical disorder of the heart that can cause arrhythmias and sudden death. Patients with autoimmune diseases ...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/cvy310

    authors: Szendrey J,Lamothe SM,Vanner S,Guo J,Yang T,Li W,Davis J,Joneja M,Baranchuk A,Zhang S

    更新日期:2019-08-01 00:00:00

  • Unfavourable consequences of chronic cardiac HIF-1α stabilization.

    abstract:AIMS:The hypoxia-inducible factor-1 (HIF-1) is the master modulator of hypoxic gene expression. The effects of chronically stabilized cardiac HIF-1α and its role in the diseased heart are not precisely known. The aims of this study were as follows: (i) to elucidate consequences of HIF-1α stabilization in the heart; (ii...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/cvs014

    authors: Hölscher M,Schäfer K,Krull S,Farhat K,Hesse A,Silter M,Lin Y,Pichler BJ,Thistlethwaite P,El-Armouche A,Maier LS,Katschinski DM,Zieseniss A

    更新日期:2012-04-01 00:00:00

  • Alterations in left ventricular compliance due to changes in right ventricular volume, pressure and compliance.

    abstract::Because of ventricular interdependence, part of the measured left ventricular diastolic pressure can be attributed to the right ventricle. Therefore, we examined the hypothesis that left ventricular diastolic properties are modified by alterations in right ventricular compliance and pressure even without a change in r...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/22.11.768

    authors: Santamore WP,Constantinescu M,Vinten-Johansen J,Johnston WE,Little WC

    更新日期:1988-11-01 00:00:00

  • Dominant-negative effect of SCN5A N-terminal mutations through the interaction of Na(v)1.5 α-subunits.

    abstract:AIMS:Brugada syndrome (BrS) is an autosomal-inherited cardiac arrhythmia characterized by an ST-segment elevation in the right precordial leads of the electrocardiogram and an increased risk of syncope and sudden death. SCN5A, encoding the cardiac sodium channel Na(v)1.5, is the main gene involved in BrS. Despite the f...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/cvs211

    authors: Clatot J,Ziyadeh-Isleem A,Maugenre S,Denjoy I,Liu H,Dilanian G,Hatem SN,Deschênes I,Coulombe A,Guicheney P,Neyroud N

    更新日期:2012-10-01 00:00:00

  • Mitochondrial permeability transition pore opening during myocardial reperfusion--a target for cardioprotection.

    abstract::Reperfusion of the heart after a period of ischaemia leads to the opening of a nonspecific pore in the inner mitochondrial membrane, known as the mitochondrial permeability transition pore (MPTP). This transition causes mitochondria to become uncoupled and capable of hydrolysing rather than synthesising ATP. Unrestrai...

    journal_title:Cardiovascular research

    pub_type: 杂志文章,评审

    doi:10.1016/S0008-6363(03)00533-9

    authors: Halestrap AP,Clarke SJ,Javadov SA

    更新日期:2004-02-15 00:00:00

  • The effect of therapeutic doses of lidocaine hydrochloride on the effective refractory period of the right ventricle in man.

    abstract::The effect of lidocaine on the effective refractory period of the right ventricle (EVRP) was measured in 10 patients using the extra stimulus technique of progressive introduction of premature stimuli until a response could not be elicited. In four patients lidocaine produced a significant decrease in the EVRP, in a f...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/9.5.621

    authors: Olsson SB,Harper R,Rydén L,Hilmy WA

    更新日期:1975-09-01 00:00:00

  • Pitx2 impairs calcium handling in a dose-dependent manner by modulating Wnt signalling.

    abstract:AIMS:Atrial fibrillation (AF) is the most common type of arrhythmia in humans, yet the genetic cause of AF remains elusive. Genome-wide association studies (GWASs) have reported risk variants in four distinct genetic loci, and more recently, a meta-GWAS has further implicated six new loci in AF. However, the functional...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/cvv207

    authors: Lozano-Velasco E,Hernández-Torres F,Daimi H,Serra SA,Herraiz A,Hove-Madsen L,Aránega A,Franco D

    更新日期:2016-01-01 00:00:00

  • Intracoronary administration of saralasin: effects on cardiac arrhythmias induced by ischaemia and reperfusion in the anaesthetised dog.

    abstract:OBJECTIVE:The aim was to study (1) the effects of intracoronary saralasin, an angiotensin II receptor antagonist, on ischaemia induced and reperfusion induced regional cardiac noradrenaline release and ventricular arrhythmias; and (2) the implication of angiotensin II in coronary constriction during myocardial ischaemi...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/26.10.968

    authors: Ribuot C,Yamaguchi N,Godin D,Jetté L,Nadeau R

    更新日期:1992-10-01 00:00:00

  • Keeping up the balance: role of HDACs in cardiac proteostasis and therapeutic implications for atrial fibrillation.

    abstract::Cardiomyocytes are long-lived post-mitotic cells with limited regenerative capacity. Proper cardiomyocyte function depends critically on the maintenance of a healthy homeostasis of protein expression, folding, assembly, trafficking, function, and degradation, together commonly referred to as proteostasis. Impairment o...

    journal_title:Cardiovascular research

    pub_type: 杂志文章,评审

    doi:10.1093/cvr/cvv265

    authors: Zhang D,Hu X,Henning RH,Brundel BJ

    更新日期:2016-04-01 00:00:00

  • Exosite 1 thrombin inhibition with JNJ-64179375 inhibits thrombus formation in a human translational model of thrombosis.

    abstract:AIMS:JNJ-64179375 (hereafter JNJ-9375) is a first-in-class, highly specific, large molecule, exosite 1 thrombin inhibitor. In preclinical studies, JNJ-9375 demonstrated robust antithrombotic protection with a wider therapeutic index when compared to apixaban. The purpose of the present study was to examine for the firs...

    journal_title:Cardiovascular research

    pub_type: 杂志文章,随机对照试验

    doi:10.1093/cvr/cvy227

    authors: Wilson SJ,Connolly TM,Peters G,Ghosh A,Johnson M,Newby DE

    更新日期:2019-03-01 00:00:00

  • Diabetes mellitus attenuates the repolarization reserve in mammalian heart.

    abstract:OBJECTIVE:In diabetes mellitus several cardiac electrophysiological parameters are known to be affected. In rodent experimental diabetes models changes in these parameters were reported, but no such data are available in other mammalian species including the dog. The present study was designed to analyse the effects of...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1016/j.cardiores.2006.11.010

    authors: Lengyel C,Virág L,Bíró T,Jost N,Magyar J,Biliczki P,Kocsis E,Skoumal R,Nánási PP,Tóth M,Kecskeméti V,Papp JG,Varró A

    更新日期:2007-02-01 00:00:00

  • Interleukin 8 and cardiovascular disease.

    abstract::Since the establishment of the inflammatory basis of atherosclerosis, several pro- or anti-inflammatory agents have been examined as potential mediators of the biochemical pathways of lesion formation. Interleukin (IL)-8 was first characterized in 1987. Since then, knowledge regarding its role in leucocyte trafficking...

    journal_title:Cardiovascular research

    pub_type: 杂志文章,评审

    doi:10.1093/cvr/cvp241

    authors: Apostolakis S,Vogiatzi K,Amanatidou V,Spandidos DA

    更新日期:2009-12-01 00:00:00

  • Developmental origin of age-related coronary artery disease.

    abstract:AIM:Age and injury cause structural and functional changes in coronary artery smooth muscle cells (caSMCs) that influence the pathogenesis of coronary artery disease. Although paracrine signalling is widely believed to drive phenotypic changes in caSMCs, here we show that developmental origin within the fetal epicardiu...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/cvv167

    authors: Wei K,Díaz-Trelles R,Liu Q,Diez-Cuñado M,Scimia MC,Cai W,Sawada J,Komatsu M,Boyle JJ,Zhou B,Ruiz-Lozano P,Mercola M

    更新日期:2015-07-15 00:00:00

  • Effects of chronic PGHS-2 inhibition on PGHS-dependent vasoconstriction in the aged female rat.

    abstract:OBJECTIVE:In menopause, aging and decreased estrogen levels are risk factors contributing to impaired vascular function. Previously, in a young ovariectomized rat model, we demonstrated an increase in prostaglandin H synthase (PGHS)-dependent vasoconstriction that could be prevented by estrogen replacement. Subsequentl...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1016/j.cardiores.2003.11.009

    authors: Armstrong SJ,Xu Y,Davidge ST

    更新日期:2004-02-01 00:00:00

  • Role of platelets in coronary thrombosis and reperfusion of ischemic myocardium.

    abstract::Platelet-dependent thrombus formation is a key event in the pathogenesis of acute myocardial infarction (AMI). Platelets mediate both thrombotic occlusion of the entire epicardial coronary artery and also accumulate in the microcirculation resulting in impairment of microcirculation and provoking myocardial ischemia d...

    journal_title:Cardiovascular research

    pub_type: 杂志文章,评审

    doi:10.1016/j.cardiores.2003.11.036

    authors: Gawaz M

    更新日期:2004-02-15 00:00:00

  • The effect of cholesteryl ester transfer protein overexpression and inhibition on reverse cholesterol transport.

    abstract:AIMS:Cholesteryl ester transfer protein (CETP) has a well-established role in lipoprotein metabolism, but the effect of its overexpression or inhibition on the efficiency of reverse cholesterol transport (RCT) is unclear. METHODS AND RESULTS:Neither overexpression of CETP nor treatment with CETP inhibitor Torcetrapib ...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/cvm087

    authors: Tchoua U,D'Souza W,Mukhamedova N,Blum D,Niesor E,Mizrahi J,Maugeais C,Sviridov D

    更新日期:2008-03-01 00:00:00

  • Pretreatment with the adenosine A1 selective agonist, 2-chloro-N6-cyclopentyladenosine (CCPA), causes a sustained limitation of infarct size in rabbits.

    abstract:OBJECTIVE:The highly selective adenosine A1 receptor agonist, 2-chloro-N6-cyclopentyl-adenosine (CCPA), has been shown to be as cardioprotective as ischaemic preconditioning when evaluated with an early staining method using tetrazolium. However, tetrazolium-positive tissue measured 3 h after reperfusion may still over...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/27.4.652

    authors: Tsuchida A,Liu GS,Wilborn WH,Downey JM

    更新日期:1993-04-01 00:00:00

  • Effect of angiotensin II on noradrenaline release in the human forearm.

    abstract:OBJECTIVE:The aim was to test the hypothesis that in normal humans angiotensin II would stimulate local release of noradrenaline under basal conditions or during a sympathetic stimulus provided by lower body negative pressure (LBNP). METHODS:Nine healthy volunteers received intra-arterial infusions of angiotensin II, ...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/28.5.663

    authors: Goldsmith SR,Rector TS,Bank AJ,Garr M,Kubo SH

    更新日期:1994-05-01 00:00:00

  • Prevention of ischemic rigor contracture during coronary occlusion by inhibition of Na(+)-H+ exchange.

    abstract:OBJECTIVE:To determine the effect of Na(+)-H+ exchange blockade on ischemic rigor contracture and reperfusion-induced hypercontracture. METHODS:Thirty-six pigs were submitted to 55 min of coronary occlusion and 5 h reperfusion. Myocardial segment length analysis with ultrasonic microcrystals was used to detect ischemi...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1016/s0008-6363(97)00106-5

    authors: Garcia-Dorado D,González MA,Barrabés JA,Ruiz-Meana M,Solares J,Lidon RM,Blanco J,Puigfel Y,Piper HM,Soler-Soler J

    更新日期:1997-07-01 00:00:00

  • The role of taurine in the pathogenesis of the cardiomyopathy of insulin-dependent diabetes mellitus.

    abstract::The cellular and molecular physiology and pathology of insulin-dependent diabetes mellitus (IDDM) and non-insulin-dependent diabetes mellitus (NIDDM) are mostly studied and understood through the use of animal models. Fundamental differences between the IDDM and NIDDM animal models may help to explain the etiology beh...

    journal_title:Cardiovascular research

    pub_type: 杂志文章,评审

    doi:10.1016/s0008-6363(00)00025-0

    authors: Militante JD,Lombardini JB,Schaffer SW

    更新日期:2000-06-01 00:00:00

  • Enhanced binding of calmodulin to the ryanodine receptor corrects contractile dysfunction in failing hearts.

    abstract:AIMS:The channel function of the cardiac ryanodine receptor (RyR2) is modulated by calmodulin (CaM). However, the involvement of CaM in aberrant Ca(2+) release in diseased hearts remains unclear. Here, we investigated the pathogenic role of defective CaM binding to the RyR2 in the channel dysfunction associated with he...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1093/cvr/cvs271

    authors: Hino A,Yano M,Kato T,Fukuda M,Suetomi T,Ono M,Murakami W,Susa T,Okuda S,Doi M,Kobayashi S,Yamamoto T,Koseki N,Kyushiki H,Ikemoto N,Matsuzaki M

    更新日期:2012-12-01 00:00:00

  • Atrial remodelling in atrial fibrillation: CaMKII as a nodal proarrhythmic signal.

    abstract::CaMKII is a serine-threonine protein kinase that is abundant in myocardium. Emergent evidence suggests that CaMKII may play an important role in promoting atrial fibrillation (AF) by targeting a diverse array of proteins involved in membrane excitability, cell survival, calcium homeostasis, matrix remodelling, inflamm...

    journal_title:Cardiovascular research

    pub_type: 杂志文章,评审

    doi:10.1093/cvr/cvw002

    authors: Mesubi OO,Anderson ME

    更新日期:2016-04-01 00:00:00

  • Reversible activation of nuclear factor-kappaB in human end-stage heart failure after left ventricular mechanical support.

    abstract:OBJECTIVE:Left ventricular assist devices (LVAD) have been used to 'bridge' patients with end-stage heart failure to transplantation. Although several reports have suggested that the native ventricular function recovers after long-term LVAD support, a process called 'reverse remodeling', the underlying biological mecha...

    journal_title:Cardiovascular research

    pub_type: 杂志文章

    doi:10.1016/s0008-6363(01)00433-3

    authors: Grabellus F,Levkau B,Sokoll A,Welp H,Schmid C,Deng MC,Takeda A,Breithardt G,Baba HA

    更新日期:2002-01-01 00:00:00