Serum Magnesium and Potassium in Acute Myocardial Infarction: Relationship to Existing β-Blockade and Infarct Size

Angiology ◽  
1993 ◽  
Vol 44 (5) ◽  
pp. 347-352 ◽  
Author(s):  
Knud Landmark ◽  
Petter Urdal ◽  
Knud Landmark
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Infarct Size ◽  
Serum Magnesium

Preinfarction Angina and Improved Reperfusion of the Infarct-related Artery

1999 ◽  
Vol 82 (S 01) ◽  
pp. 68-72 ◽  
Author(s):  
Alessandro Sciahbasi ◽  
Eugenia De Marco ◽  
Attilio Maseri ◽  
Felicita Andreotti
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Infarct Size ◽  
Ischemic Preconditioning ◽  
Early Reperfusion ◽  
Vast Number ◽  
Beneficial Effects ◽  
Infarct Related Artery ◽  
Cardioprotective Effects ◽  
Collateral Vessels

SummaryPreinfarction angina and early reperfusion of the infarct-related artery are major determinants of reduced infarct-size in patients with acute myocardial infarction. The beneficial effects of preinfarction angina on infarct size have been attributed to the development of collateral vessels and/or to post-ischemic myocardial protection. However, recently, a relation has been found between prodromal angina, faster coronary recanalization, and smaller infarcts in patients treated with rt-PA: those with preinfarction angina showed earlier reperfusion (p = 0.006) and a 50% reduction of CKMB-estimated infarct-size (p = 0.009) compared to patients without preinfarction angina. This intriguing observation is consistent with a subsequent observation of higher coronary recanalization rates following thrombolysis in patients with prodromal preinfarction angina compared to patients without antecedent angina. Recent findings in dogs show an enhanced spontaneous lysis of plateletrich coronary thrombi with ischemic preconditioning, which is prevented by adenosine blockade, suggesting an antithrom-botic effect of ischemic metabolites. Understanding the mechanisms responsible for earlier and enhanced coronary recanalization in patients with preinfarction angina may open the way to new reperfusion strategies.A vast number of studies, globally involving ≈17,000 patients with acute myocardial infarction, have unequivocally shown that an infarction preceded by angina evolves into a smaller area of necrosis compared to an infarct not preceded by angina (Table 1) (1). So far, preinfarction angina has been thought to have cardioprotective effects mainly through two mechanisms: collateral perfusion of the infarctzone (2-4), and ischemic preconditioning of the myocardium (5-7). Here we discuss a further mechanism of protection represented by improved reperfusion of the infarct-related artery.

Abstract 12: EMMPRIN-Targeted Magnetic Nanoparticles for in vivo Visualization and Regression of Acute Myocardial Infarction in a Model of Acute Coronary Artery Occlusion

2015 ◽  
Vol 35 (suppl_1) ◽  
Author(s):  
Irene Cuadrado ◽  
Maria Jose Garcia Miguel ◽  
Irene Herruzo ◽  
Mari Carmen Turpin ◽  
Ana Martin ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Extracellular Matrix ◽  
Coronary Artery ◽  
Left Ventricle ◽  
Infarct Size ◽  
Coronary Artery Occlusion ◽  
Artery Occlusion ◽  
Gadolinium Enhancement

Extracellular matrix metalloproteinase inducer EMMPRIN, is highly expressed in patients with acute myocardial infarction (AMI), and induces activation of several matrix metalloproteinases (MMPs), including MMP-9 and MMP-13. To prevent Extracellular matrix degradation and cardiac cell death we targeted EMMPRIN with paramagnetic/fluorescent micellar nanoparticles with an EMMPRIN binding peptide AP9 conjugated (NAP9), or an AP9 scramble peptide as a negative control (NAPSC). NAP9 binds to endogenous EMMPRIN as detected by confocal microscopy of cardiac myocytes and macrophages incubated with NAP and NAPSC in vitro, and in vivo in mouse hearts subjected to left anterior descending coronary artery occlusion (IV injection 50mγ/Kg NAP9 or NAP9SC). Administration of NAP9 at the same time or 1 hour after AMI reduced infarct size over a 20% respect to untreated and NAPSC injected mice, recovered left ventricle ejection fraction (LVEF) similar to healthy controls, and reduced EMMPRIN downstream MMP9 expression. In magnetic resonance scans of mouse hearts 2 days after AMI and injected with NAP9, we detected a significant gadolinium enhancement in the left ventricle respect to non-injected mice and to mice injected with NAPSC. Late gadolinium enhancement assays exhibited NAP9-mediated left ventricle signal enhancement as early as 30 minutes after nanoprobe injection, in which a close correlation between the MRI signal enhancement and left ventricle infarct size was detected. Taken together, these results point EMMPRIN targeted nanoprobes as a new tool for the treatment of AMI.

scholarly journals Correlations of Serum Magnesium and Potassium in Acute Myocardial Infarction, Chronic Ischemic Heart Disease and Normal Healthy Volunteers of Bangladesh

2013 ◽  
Vol 3 (2) ◽  
pp. 50-56
Author(s):  
MBK Choudhury ◽  
MM Hossain ◽  
M Akhtaruzzaman ◽  
MM Jamal Uddin ◽  
MS Rahman ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Heart Disease ◽  
Ischemic Heart Disease ◽  
Healthy Volunteers ◽  
Serum Magnesium ◽  
Ischemic Heart ◽  
Diagnostic Tools ◽  
Strong Positive Correlation ◽  
Chronic Ischemic Heart Disease

Magnesium (Mg) and potassium (K) are the major intracellular cations whose presence in the serum are low, but minor changes of those may show a remarkable change in the various body functions specially in the heart. The study was designed to find out the correlation between serum Mg and K in acute myocardial infarction (AMI), chronic ischemic heart disease (CIHD) and normal healthy volunteers. It was carried out over a period of 18 months in the Department of Biochemistry, Bangabandhu Sheikh Mujib Medical University (BSMMU) in collaboration with Department of Cardiology, Sir Salimullah Medical College & Mitford Hospital (SSMC & MH) and Atomic Energy Center, Dhaka. A total of 101 subjects were included in which 32 subjects were AMI, 34 CIHD and 35 normal healthy volunteers. Serum glucose and serum creatinine were estimated to exclude diabetes and renal dystrophies. Estimation of serum CK-MB and ECG tracing were done as diagnostic tools of AMI and to categories the subjects into various groups. Serum Mg was estimated by Atomic absorption spectrophotometer and serum K by Ion sensitive electrode. The present study shows that there is a strong positive correlation of serum Mg and K in AMI, CIHD and healthy control subjects (r = 0.566, p<0.01 level). So it is suggested to estimate and supplement both Mg and K in IHD patients for their better management. DOI: http://dx.doi.org/10.3329/bjmb.v3i2.13812 Bangladesh J Med Biochem 2010; 3(2): 50-56

Large infarct size and electrocardiographic reperfusion criteria. A study withTc99m sestamibi in anterior acute myocardial infarction treated with fibrinolysis

2005 ◽  
Vol 12 (2) ◽  
pp. S11-S11
Author(s):  
J GALCERA ◽  
I LOPEZMARTINEZ ◽  
A CABALLEROMARTINEZ ◽  
J DELAROSA ◽  
J VALENTIALDEGUER ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Infarct Size ◽  
Large Infarct
Sign in / Sign up

Export Citation Format

Share Document