Change of the P wave duration and P wave dispersion according to treatment strategy in patients with a acute myocardial infarction / 대한내과학회지

BACKGROUND: P wave dispersion (PWD) and P wave duration have been used to evaluate the discontinuous propagation of sinus impulse and the prolongation of atrial conduction time, respectively. This study was conducted to compare the change of the maximal P wave duration (Pmax) and PWD according to the treatment strategy used in patients with an acute myocardial infarction (AMI). METHODS: We retrospectively evaluated 86 patients that experienced an AMI. Patients were classified into three groups according to the treatment strategy: primary percutaneous coronary intervention (PCI), thrombolytic therapy, and delayed PCI. ECGs that were obtained from all patients on admission and on the second day were analyzed. The Pmax and minimum P wave duration (Pmin) were measured from a 12-lead ECG. The PWD was calculated as the difference between the Pmax and Pmin. RESULT: There was no significant difference in the age, gender, medication, coronary risk factor, ejection fraction, left atrial diameter, basal Pmax and PWD among the groups. However, there were significant differences in P max and PWD between the primary PCI group and the other groups on the second day after hospital admission. In the thrombolytic therapy and delayed PCI groups, the PWD was significantly lower in the patients with a patent infarct-related artery (IRA) than in patients without a patent IRA on the second day after hospital admission. CONCLUSIONS: These findings suggest that a primary PCI decreased the Pmax and PWD more than thrombolytic therapy or a delayed PCI.

The Relationship between the Left Atrial Volume and the Maximum P-wave and P-wave Dispersion in Patients with Congestive Heart Failure

PURPOSE: A maximum P-wave duration (Pmax) of > or = 110msec and a P-wave dispersion (PWD) > or = 40msec are accepted indicators of a disturbance in interatrial conduction and an inhomogeneous propagation of the sinus impulse, respectively. The left atrial (LA) volume has been reported to be strongly associated with a systolic and diastolic dysfunction and is considered to be an index of atrial remodeling. We aimed to investigate the relationship between LA volume and Pmax or PWD in patients with congestive heart failure (CHF). PATIENTS AND METHODS: Sixty-one patients with CHF were enrolled in this study. The study population was classified into four groups: two groups were divided according to the Pmax (> or = 110msec or or = 40msec or or = 110ms or a PWD > or = 40ms and those with a Pmax < 110ms or a PWD < 40ms. The LAVi was independently associated with a disturbance in interatrial conduction and an inhomogeneous propagation of the sinus impulse. The LAVi can be used to identify patients with a disturbance in interatrial conduction and an inhomogeneous propagation of the sinus impulse with reasonably good accuracy. CONCLUSION: We concluded that a disturbance in interatrial conduction and an inhomogenous propagation of the sinus impulse in patients with CHF is associated with an increase in the LA volume and a deleterious systolic and diastolic dysfunction.

Syndrome of Inappropriate Secretion of Antidiuretic Hormone Following Adjuvant Chemotherapy with Cisplatin plus Paclitaxel in Non-Small Cell Lung Cancer Patient / 결핵및호흡기질환

We report a case of pulmonary adenocarcinoma complicated by the syndrome of inappropriate secretion of antidiuretic hormone (SIADH) following adjuvant chemotherapy. A 51-year-old woman with stage IIIA adenocarcinoma received left lower lobe lobectomy in July, 2006. And then combination chemotherapy with paclitaxel and cisplatin was given to the patient. In five days after completion of second cycle of the chemotherapy, she visited emergency room because of general weakness and seizure. Her brain MRI was shown to be no evidence of brain metastasis. Serum sodium, urine and plasma osmolarities were 117mEq/L, 589 and 244mOsm/kg, respectively. She was improved with fluid restriction. Although occurrence of SIADH following chemotherapy is rare, physician should give an attention the potential for development of SIADH in the course of chemotherapyin non-small cell lung cancer patient.