Combined interventional procedure and cardiopulmonary bypass surgery in a dog with cor triatriatum dexter, patent foramen ovale, and pulmonary stenosis.

A 2-year-old American Pit Bull dog was presented for surgical evaluation of imperforate cor triatriatum dexter (CTD) and patent foramen ovale (PFO). Echocardiography identified an imperforate CTD associated with a right-to-left shunting PFO and valvular pulmonary stenosis. A 2-step interventional and surgical approach was used. Initially, a pulmonary balloon valvuloplasty was performed, and subsequently the dog underwent a surgical correction of the atrial anomaly under cardiopulmonary bypass.

Takotsubo cardiomyopathy associated with Kounis syndrome: A clinical case of the "ATAK complex".

A 60-year-old female developed cardiac arrest after experiencing an anaphylactic shock during administration of plasma-expanders. An electrocardiogram registered after restoration of sinus rhythm showed mild ST-elevation in the anterior precordial leads and T waves changes followed by appearance of echocardiographic alterations of left ventricular apex kinesis. Coronary angiography revealed normal coronary arteries, and cardiovascular magnetic resonance confirmed apical ballooning with late gadolinium enhancement in the segments with abnormal contractility. This uncommon clinical case confirms how takotsubo and Kounis syndrome may converge in a single nosological entity, the so-called "ATAK complex" (Adrenaline, Tako-Tsubo, Anaphylaxis, and Kounis), with a specific management and prognostic implications. .

Role of Preoperative Cardiovascular Magnetic Resonance in Planning Ventricular Septal Myectomy in Patients With Obstructive Hypertrophic Cardiomyopathy.

In obstructive hypertrophic cardiomyopathy (HC), extreme heterogeneity of septal morphology makes septal myectomy particularly challenging. Although cardiovascular magnetic resonance (CMR) reconstructs ventricular anatomy with high spatial resolution, CMR is not used systematically to plan preoperatively septal myectomy. In this study, we report our results with using CMR to plan the extent of septal excision in 112 consecutive HC patients who subsequently underwent myectomy. Depth and length of the myectomy planned at CMR were compared with those of the septal muscle excised in a single piece in all patients. Anterior septum maximal thickness at CMR was 22 ± 5 mm and excised muscle thickness 9 ± 3 mm. Planned myectomy length was 35 ± 11 mm (range 17 to 65) and excised muscle length 38 ± 10 mm (range 10 to 70), indicating extension of septal resection to mid-cavity. Thickness and length of the planned myectomy showed a significant correlation with the excised muscle (R2 = 0.345; p <0.001; and R2 = 0.358; p <0.001, respectively). Deep septal crypts were identified at CMR in 12(11%) patients, preventing muscle excision from areas at increased risk of iatrogenic septal defect. Large aberrant muscle bundles that could decrease mid-cavity dimension were identified at CMR and excised in 26(23%) patients. In the 55 patients with postoperative CMR, qualitative comparison of pre and postoperative ventricular morphology showed a smooth and apically extended myectomy. In conclusion, CMR planning of septal myectomy provided high resolution images of septal morphology and allowed us to perform a standardized and apically extended septal excision that was associated with favorable outcome. Our novel approach could make myectomy more accessible to cardiovascular surgeons.

Electrocardiogram-gated 16-multidetector computed tomographic angiography of the coronary arteries in dogs.

The aims of this study were to assess if ECG-gated 16-multidetector CT (MDCT) provides sufficient temporal and spatial resolution to evaluate canine coronary arteries and provide a detailed description of their anatomy. A total of 24 dogs were included. Images were reviewed to assess: (1) coronary artery opacification and dominance; (2) choice of optimal R-R ECG reconstruction interval for both left coronary artery (LCA) and right coronary artery (RCA); (3) branching patterns of the left main coronary artery (LMCA); and (4) diameter and length of the LCA and RCA and classification of their branches by adapting a previously described segmental coding system. The degree of opacification of the coronary arteries was subjectively judged as excellent or good in five and 19 dogs, respectively. All hearts showed a left coronary dominance. The best R-R reconstruction interval for both LCA and RCA arteries was 75 per cent. Seven different subtypes of LMCA branching patterns were noted. The rami circumflexus and interventricularis paraconalis were divided into three angiographic segments, and the ramus septi interventricularis and the RCA in two and three segments, respectively. ECG-gated 16-MDCT coronary angiography provides adequate resolution to assist the basic anatomy of the main coronary artery branches.

Multislice computed tomography for the evaluation of coronary bypass grafts and native coronary arteries: comparison with traditional angiography.

BACKGROUND: Multislice computed tomography (CT) is a promising new noninvasive technique for the detection of atherosclerotic disease within a vessel's wall. The present study was designed to assess the diagnostic accuracy of 64-slice CT in detecting graft disease and in the evaluation of native vessels distally to the grafts. METHODS: Forty consecutive patients with previous coronary artery bypass underwent both invasive coronary angiography and 64-slice CT. The CT data were acquired over 7-12 s period during a single-breath hold using the Smartprep technique. Images were reconstructed using the retrospective modality on a synchronized ECG in a time frame of between 40 and 80% of the R-R interval. RESULTS: A total of 118 grafts were investigated (80 vein and 38 arterial conduits). At CT, 31/38 arterial grafts were classified as patent and free from significant lesions, whereas seven appeared diseased (five complete occlusion and two significant stenoses along the body of the graft). Out of 80 vein grafts, 52 appeared free of disease and 28 diseased (23 total occlusion and five critical stenosis). An absolute concordance between CT and angiographic findings was documented for all arterial and venous grafts (100% diagnostic concordance). The accuracy of 64-slice CT in the assessment of distal run-off arteries was 90%. CONCLUSION: The 64-slice CT detected with very high accuracy the presence of diseased arterial and vein grafts. Moreover, an optimal diagnostic accuracy was also documented in the appraisal of native vessels distal to the graft anastomoses. On the basis of these results, 64-slice CT can be proposed for the study of patients after coronary artery bypass and may represent an effective screening technique to select those patients with indications of new revascularization.