Israel Medical Association Journal

Background: Percutaneous transluminal septal ablation was recently introduced as an alternative to surgical treatment of hypertrophic obstructive cardiomyopathy. In this procedure, alcohol is injected into a proximal septal artery to create a localized myocardial infarction.

Objectives: To characterize the immediate and mediumterm results following PTSMA.

Methods: Of 13 patients referred for PTSMA, 8 were found suitable for the procedure. Hemodynamic parameters were evaluated prior to and following the procedure, and clinical and echo-Doppler parameters at 2 weeks and 9 months later.

Results: The procedure was technically successful in all patients. Resting left ventricular outflow gradient at rest (by Doppler) fell from 82 + 37 to 15 + 8 mmHg (P<0.001) 9 months later. Late post-procedural gradient after the Valsalva maneuver was 2 + 24 mmHg. The degree of mitral regurgitation fell from 2.0 + 0 to 1.5 + 0.5 (P<0.05). New York Heart Association class for dyspnea improved from 2.8 + 0.5 to 1.8 + (P<0.01) and Canadian Cardiovascular Society class for angina from 2.0 + 1.3 to 1.3 + 1.2 (P=0.08). Complete right bundle branch block developed in six patients, temporary complete atrioventricular block in three, and persistent block requiring permanent pacing in one. No flow in the distal left anterior descending coronary artery (presumably due to spilling of alcohol) was seen in one (with development of a small antero-apical infraction) and ventricular fibrillation 2 hours post-procedure in one. None of the patients died.

Conclusion: PTSMA provided a substantial reduction in left ventricular outflow gradient associated with an improvement in symptomatology. Serious complications are not uncommon. Long-term follow-up is unknown.
 

Background: The association between coronary and/or other arterial aneurysms and polycystic kidney disease is well known. While myocardial infarction is a possible complication of atheroscletotic coronary aneurysms, it is reasonable to assume that CA[1] in patients with PKD[2] may make them prone them for a similar complication.

Objective: To evaluate the possible occurrence of CA and MI[3] in first relatives of a patient with PKD, CA and MI.

Patients: We studied 12 family members: 2 parents, 8 sisters and 2 brothers of a young woman who was incidentally diagnosed as having a MI, while her mother was known to have PKD. We used electrocardiogram, thallium-image test, and transthoracic echocardiography to determine MI, ultrasonography of the kidney to determine PKD, and coronary angiography and ventriculography to determine CA and MI, respectively. 

Results: PKD was detected in seven family members, while CA and MI were found in five and three of them, respectively.

Conclusions: In a family with PKD we detected a high prevalence of CA, with MI as a complication of the latter.

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Background: Recent studies have suggested a possible association between Chlamydia pneumoniae infection and coronary heart disease.

Objectives: To determine titers of antibodies to Chlamydia pneumoniae in patients with acute  myocardial infraction compared with titers in several control groups.

Methods: This prospective case-control study investigated 209 individuals. We assessed the serum IgG antibody titers to Chlamydia pneumoniae in 57 consecutive patients admitted with AMI to our intensive coronary care unit during a 4 month period. A serum sample was drawn upon admission after 6 weeks. Results were compared with those of four control groups: a) patients admitted with community-acquired pneumonia (n=18), b) patients with community-acquired urinary tract infection (n=42), c) patients with angiographically normal coronary artery disease (n=44), and d) patients with stable coronary artery disease (n=48). Serum immunoglobin G antibody titers to C. pneumoniae were determined using standard micro-immunofluorescene technology.

Results: Of 57 patients with AMI, 32 (56%) had a high lgG titer to C. pneumoniae (>=1:256) on the initial test, which remained unchanged (62%) after 6 weeks. The percentage of patients with high titers was significantly lower in the control groups: 5 of 18 patients (28%) in the pneumonia group (P<0.01), 11 of 42 (26%) in the urinary tract infection group (P<0.01), 11 of 44 (25%) with normal coronary arteries (P<0.01), and 17 of 48 (35%) with stable chronic ischemic heart disease (P<0.05).

Conclusion: The detection of high titers of lgG antibodies to C. pneumoniae in many patients with AMI, compared to control groups, suggest that chronic Chlamydia pneumoniae infection plays a role in the pathogenesis of atherosclerosis and acute ischemic events.

Background: Previous studies have documented that reduction in QT dispersion after thrombolytic treatment in acute myocardial infarction depends on reperfusion status as well as infarct site. Primary percutaneous transluminal coronary angioplasty as compared with thrombolytic therapy has been shown to result in higher patency rates of the infarct vessel.

Objectives: To evaluate whether primary PTCA has a more favorable effect on reducing QT dispersion in patients with acute MI as compared to thrombolytic treatment.

Methods: The study population included 42 consecutive patients (33 men, mean age 58 ± 11 years) with acute Ml (24 anterior wall, 18 inferior wall) who were treated with primary PTCA (group A, n 21) or thrombolytic therapy (group B, n = 21) at 3.9+2 hours after symptom onset. QT intervals were measured before and 24 hours after treatment.

Results: On the admission electrocardiogram, patients with anterior Ml had higher values of QT and QTc dispersions than patients with inferior Ml (52±9 vs. 36±9 msec, R<0.05 and 61+4 vs. 56+4 msec, P=0.002, respectively). There was a significant reduction in QT and QTc dispersions from admission to 24 hours in all patients (from 50+9 to 37+9 msec, P<0.001 and from 59+5 to 42+5 msec, P<0.001. respectively), and also in group A (from 49±8 to 32±5 msec. P<0.001 and from 58+5 to 38+3 msec, P<0.001, respec­tively) and in group B patients (from 51+10 to 42+10 msec. P<0.01 and from 60±4 to 46±5 msec, P<0.001, respec­tively). QT and QTc dispersions were found to be shorter in group A at 24 hours after treatment than in group B (32 + 5 vs. 42+10 msec, P<0.001 and 38+3 vs. 46+5 msec, P<0.001. respectively).

Conclusions: Reperfusion therapy with primary PTCA or thrombolytic agents reduces QT and QTc dispersions in acute Ml. QT and QTc dispersions after reperfusion treatment are shorter with primary PTCA than with thrombolytic therapy.

Background: Cigarette smoking is a major contributor to the risk of acute myocardial infarction and the subsequent morbidity and mortality. Physicians can play an important role in smoking cessation among patients with AMI because of their frequent contact with the patient during the event.

Objectives: To study the prevalence of smoking, age, localization of coronary occlusion, mortality and rate of smoking cessation in consecutive patients who were diagnosed with a first AMI in our center in 1989–93.

Methods: The study included 1,510 consecutive patients with first AMI: 973 men (512 smokers, 52.6%) and 537 women (215 smokers, 40%), whose mean age was 64.1±6.7 and 68.6±5.2 years respectively.

Results: The median age at the first AMI in non-smoking and smoking men differed significantly (70.4±6.8 vs. 56.6±6.1 years, P<0.001) while the difference in the women was smaller (70.4±6.9 vs. 66.8±7.2). The proportion of smokers/non-smokers among men was greater at a younger age and decreased proportionally with age. The overall mortality was 11.3% with a significant difference in mortality rate in the younger age groups between smokers and non-smokers (1% vs. 0% in the age group 31–40 years, P<0.05, and 6.1% vs. 0.8% in the 41–50 year age group, P<0.001). Only 62% of the smokers who survived the AMI declared that they had received anti-smoking advice from a physician during hospitalization. The cessation rate in this group was significantly higher than in smokers who had not been cautioned against smoking (56% vs. 18%).

Conclusions: Current smokers sustained their first AMI more than one decade earlier than non-smokers, and the younger smokers had a higher mortality rate. The majority of the smokers who received anti-smoking advice during their hospitalization for AMI quit smoking in the year following the acute event. 

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AMI= acute myocardial infarction