Characteristics of Patients With Diabetes Having Normal Coronary Arteries

We evaluated the association between risk variables in diabetic patients with normal and diseased coronary arteries in a retrospective cohort study conducted at Rashid Hospital, Dubai. A total of 4446 patients underwent coronary angiography due to various indications; 43% had type 2 diabetes mellitus (T2DM). Among the diabetic patients, 94% had diseased coronary arteries and the remaining 6% had absolutely normal arteries. The normal coronary group had significantly lower low-density lipoprotein cholesterol (LDL-C) and a higher high-density lipoprotein cholesterol (HDL-C) levels than the diseased group. Patients with normal coronaries were more likely to be females, have T2DM for a shorter duration, and were nonsmokers and non-South Asians. They also had lower levels of LDL, hemoglobin A1c, and fasting glucose and higher levels of HDL-C. Apart from these variables, genetic or environmental factors could protect these patients from atherosclerosis.

Massive pulmonary embolism and acute limb ischaemia in a patient of hereditary spherocytosis and patent foramen ovale

Paradoxical embolism accounts for 2% of patients who present with acute arterial embolism of extremities. We report a case of a 41 year-old male with hereditary spherocytosis who presented to the emergency department with acute limb ischaemia and pulmonary embolism. On further evaluation, he was found to have patent foramen ovale (PFO) and deep vein thrombosis (DVT), leading to paradoxical embolism. The purpose of this report is to emphasise that in a patient presenting with acute limb ischaemia without an obvious systemic arterial embolic source, an evaluation for a right-to-left shunting lesion, especially PFO, should be performed.

Very late thrombosis of drug-eluting stents: a brief literature review and case example

Thrombosis late after implantation is an infrequent but increasingly recognized complication following revascularization with drug-eluting stents (DES). The window of vulnerability for this complication with DES remains undefined. Intermediate-term follow up from pivotal trials and registries suggests continuous separation of event curves out to at least 3 years. We briefly review the evolving body of literature on DES thrombosis and report a case of very late thrombosis 53 months after implantation of a sirolimus-eluting stent. The event occurred despite chronic aspirin monotherapy and represents the longest latency from implantation to thrombosis described in the literature for a DES.

Achieving 2003 European lipid goals with rosuvastatin and comparator statins in 6743 patients in real-life clinical practice: DISCOVERY meta-analysis

BACKGROUND

There is an increasing body of evidence to support the benefits of reducing low-density lipoprotein cholesterol (LDL-C) levels and this has been reflected in a lowering of LDL-C goals recommended by international guidelines. Therefore, there is a growing need for effective lipid-modifying therapies to optimise the achievement of these more stringent LDL-C goals.

OBJECTIVE

A meta-analysis of data pooled from five studies participating in the DISCOVERY (DIrect Statin COmparison of LDL-C Values: an Evaluation of Rosuvastatin therapY) Programme was performed to compare the effect of rosuvastatin treatment with other statins in real-life clinical practice.

RESULTS

These studies included 6743 patients with hypercholesterolaemia from different ethnicities, countries and cultural environments. The meta-analysis showed that significantly more patients receiving rosuvastatin 10 mg achieved the 2003 European LDL-C goals compared with those who received atorvastatin 10 mg or simvastatin 20 mg (p < 0.001 for both comparisons). A significantly greater proportion of patients receiving rosuvastatin 10 mg also achieved the 2003 European total cholesterol goal compared with those on atorvastatin 10 mg (p < 0.001).

CONCLUSIONS

The meta-analysis showed that rosuvastatin was more effective than comparator statins at lowering LDL-C levels and enabling patients to achieve lipid goals at recommended start doses. In addition, all statins studied were well tolerated and confirmed that rosuvastatin had a similar safety profile to other statins.

Single-bolus tenecteplase compared with front-loaded alteplase in acute myocardial infarction: the ASSENT-2 double-blind randomised trial

BACKGROUND

Bolus fibrinolytic therapy facilitates early efficient institution of reperfusion therapy. Tenecteplase is a genetically engineered variant of alteplase with slower plasma clearance, better fibrin specificity, and high resistance to plasminogen-activator inhibitor-1. We did a double-blind, randomised, controlled trial to assess the efficacy and safety of tenecteplase compared with alteplase.

METHODS

In 1021 hospitals, we randomly assigned 16,949 patients with acute myocardial infarction of less than 6 h duration rapid infusion of alteplase (< or = 100 mg) or single-bolus injection of tenecteplase (30-50 mg according to bodyweight). All patients received aspirin and heparin (target activated partial thromboplastin time 50-75 s). The primary outcome was equivalence in all-cause mortality at 30 days.

FINDINGS

Covariate-adjusted 30-day mortality rates were almost identical for the two groups--6.18% for tenecteplase and 6.15% for alteplase. The 95% one-sided upper boundaries of the absolute and relative differences in 30-day mortality were 0.61% and 10.00%, respectively, which met the prespecified criteria of equivalence (1% absolute or 14% relative difference in 30-day mortality, whichever difference proved smaller). Rates of intracranial haemorrhage were similar (0.93% for tenecteplase and 0.94% for alteplase), but fewer non-cerebral bleeding complications (26.43 vs 28.95%, p=0.0003) and less need for blood transfusion (4.25 vs 5.49%, p=0.0002) were seen with tenecteplase. The rate of death or non-fatal stroke at 30 days was 7.11% with tenecteplase and 7.04% with alteplase (relative risk 1.01 [95% CI 0.91-1.13]).

INTERPRETATION

Tenecteplase and alteplase were equivalent for 30-day mortality. The ease of administration of tenecteplase may facilitate more rapid treatment in and out of hospital.