Development of a cardiologist delivered service leads to improved outcomes following admission with acute coronary syndromes in a large district general hospital

BACKGROUND

East Lancashire Hospitals NHS Trust reorganized its services in October 2007 with acute admissions sent to one site which allowed the development of a 24/7 Consultant delivered cardiology service.

METHODS

A retrospective analysis of all patients admitted with an acute coronary syndrome between two periods: Group 1: October 2006 to September 2007 and Group 2: October 2007 and September 2008. We looked at the following end points-length of stay, in-hospital and 30 day all cause mortality.

RESULTS

633 patients in group 1 and 748 patients in group 2. There was significant reduction in length of stay from a median (IQ range) 7 (5-11) days to 5 (3-9) days; P<0.0001. The in-hospital mortality reduced from 15.8% (n=100) to 7.6% (n=56); P<0.0001. The mortality at 30 days reduced from 15.2% (n=96) to 8.3% (n=62); P<0.0001. These reductions remained significant after adjustment for demographic and risk factor variables.

CONCLUSION

A 24/7 Consultant Cardiologist delivered cardiac care is associated with marked reductions in all cause mortality following admission with acute coronary syndromes. This improvement occurred with a significant reduction in hospital length of stay.

Relation between coronary pressure derived collateral flow, myocardial perfusion grade, and outcome in left ventricular function after rescue percutaneous coronary intervention

OBJECTIVE

To evaluate the relation between pressure derived coronary collateral flow (PDCF) index and angiographic TIMI (thrombolysis in myocardial infarction) myocardial perfusion (TMP) grade, angiographic collateral grade, and subsequent recovery of left ventricular function after rescue percutaneous coronary intervention (PCI) for failed reperfusion in acute myocardial infarction.

METHODS

The pressure wire was used as the guidewire in 38 consecutive patients who underwent rescue PCI between December 2000 and March 2002. Follow up angiography was performed at six months. Baseline and follow up single plane ventriculograms were analysed off line by an automated edge detection technique. A linear model was fitted to assess the relation between 0.1 unit increase in PDCF and change in left ventricular regional wall motion.

RESULTS

Patients with TMP 0 grade had significantly higher mean (SD) PDCF than patients with TMP 1-3 (0.30 (0.11) v 0.15 (0.07), p < 0.0001, r = -0.5). A similar relation was observed between TMP grade and coronary wedge pressure (mean (SD) 28 (16) mm Hg with TMP 0 v 9 (7) mm Hg with TMP 1-3, p = 0.001, r = -0.4). Higher PDCF was associated with increased left ventricular end diastolic pressures (0.28 (0.14) with end diastolic pressure > 20 mm Hg v 0.22 (0.09) with end diastolic pressure < 20 mm Hg, p = 0.08, r = 0.2). No correlation was observed between PDCF and Rentrops collateral grade (0.26 (0.13) with grade 0 v 0.25 (0.11) with grades 1-3, p = 0.4, r = -0.06). No linear relation existed between changes in PDCF and changes in left ventricular regional wall motion.

CONCLUSION

PDCF in the setting of rescue PCI for failed reperfusion after thrombolysis does not predict improvement in left ventricular function. Increased PDCF and coronary wedge pressure in acute myocardial infarction reflect a dysfunctional microcirculation rather than good collateral protection.

Recovery of normal diurnal variation of blood pressure following renal artery stenting

Renal artery stenting is a therapeutic option in patients with functionally significant atherosclerotic renovascular disease. Improved control of blood pressure (BP) and preservation of renal function may be achieved following intervention. We present a case in which renal artery stenting was followed by recovery of the normal diurnal variation in BP.

Rescue percutaneous coronary intervention for failed thrombolysis: results from a district general hospital

OBJECTIVE

To assess the outcome of a policy of emergency percutaneous coronary intervention (PCI) in patients with acute myocardial infarction and electrocardiographic (ECG) evidence of failed reperfusion after thrombolysis.

DESIGN

Observational study.

SETTING

District general hospital.

PATIENTS

A total of 109 consecutive patients with acute myocardial infarction who underwent emergency angiography and angioplasty for failed reperfusion diagnosed on the basis of standard ECG criteria.

MAIN OUTCOME MEASURES

In-hospital mortality; death, infarct territory reinfarction, and reintervention by PCI or coronary artery bypass graft (CABG) during follow up; in-lab resource utilisation.

RESULTS

At initial angiography, 76 patients had Thrombolysis in Myocardial Infarction (TIMI) trial 0/1 flow and 33 had TIMI 2/3 flow. Fourteen patients were in cardiogenic shock. TIMI 3 flow was established or maintained in 93 patients (85%). Overall in-hospital mortality was 9%. It was 3% in non-shock patients, 50% in shocked patients, and 40% when the procedure was unsuccessful (TIMI 0/1 flow post-procedure). Over a mean follow up of 30 months (>12 months of follow up in all patients) there were 19 further events (one death, five reinfarctions, and 13 revascularisations (nine CABG and four PCI)). The cost of rescue PCI was not significantly higher than comparable elective interventions.

CONCLUSION

A policy of emergency angiography and PCI for failed reperfusion in acute myocardial infarction can be carried out in a hospital without on-site surgical backup with good medium term clinical outcomes.

Chronic pericardial constriction linked to the antiparkinsonian dopamine agonist pergolide

Constrictive pericarditis is present when a fibrotic, thickened, and adherent pericardium restricts diastolic filling of the heart. Several drugs can cause pericarditis, which can lead to chronic pericardial constriction. A case of constrictive pericarditis in a patient receiving the antiparkinsonian drug pergolide is reported.

Free wall rupture following rescue angioplasty and intravenous abciximab for failed thrombolysis

Early thrombolytic therapy reduces the risk of cardiac rupture but delayed thrombolysis may increase this risk, despite improving overall survival. The mechanism appears to be related to both unsuccessful early reperfusion and haemorrhagic transformation following delayed reperfusion. The effect of antiplatelet therapy with glycoprotein IIb-IIIa receptor blockers (abciximab) on cardiac rupture is unknown. It is possible that they may contribute to cardiac rupture by promoting haemorrhagic transformation of the infarcted area. In this report we describe a 57 year old man who underwent emergency coronary angioplasty and stenting following failed thrombolytic therapy for an acute anterior myocardial infarction. A suboptimal result was obtained which necessitated an intravenous bolus of abciximab followed by an infusion. He abruptly developed electromechanical dissociation. Echocardiogram confirmed pericardial tamponade and a pericardial drain was inserted but the patient could not be resuscitated. Postmortem examination confirmed a large transmural rupture of the infarcted anterior wall which had undergone haemorrhagic transformation.