Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).

Abstract: The risk of developing spontaneous ventricular tachycardia (VT) and/or sudden death ("arrhythmic events") was prospectively assessed in 165 patients who survived acute myocardial infarction. Signal-averaged electrocardiograms (ECGs) were performed before hospital discharge and then serially at regular intervals over the following year. In addition, 24 hr Holter monitoring was performed and left ventricular ejection fraction was determined. Sixty-five patients (group 1) had abnormal signal-averaged ECGs (voltage in the last 40 msec of the filtered QRS less than 20 microV or filtered QRS duration greater than 120 msec), 92 had normal signal-averaged ECGs (group 2), and eight had bundle branch block (excluded from analysis). In group 1, spontaneous normalization of the voltage in the last 40 msec of the QRS complex occurred in 30% of patients after 12 months, although total filtered QRS duration did not change overall. During follow-up of up to 20 months (median 11), seven patients died suddenly and six presented again with spontaneous, symptomatic VT. Eleven of 65 (17%) group 1 patients had an arrhythmic event compared with one of 92 patients (1%) in group 2 (p less than .001). The sensitivity of the signal-averaged ECG as a predictor of arrhythmic events was 92% with a specificity of 62%. Patients with subsequent arrhythmic events had considerably lower voltage in the last 40 msec of the QRS (11.0 +/- 8.3 vs 32.0 +/- 21.9 microV; p less than .001) than those without such events, and longer filtered QRS complexes (121 +/- 14 vs 105 +/- 12 msec; p less than .001). Multivariate logistic regression determined that the signal-averaged ECG provided independent prognostic information from the presence of complex ventricular ectopy and the degree of left ventricular dysfunction assessed at the time of hospital discharge. Signal-averaged ECGs provide important prognostic information in identifying patients at risk of arrhythmic events after myocardial infarction. Dynamic changes in the terminal QRS voltage are observed during the first year after myocardial infarction.
Which is the apt title for the abstract? option1: Late potentials detected after myocardial infarction: natural history and prognostic significance. option2: Sulindac-associated small bowel lesion.
Late potentials detected after myocardial infarction: natural history and prognostic significance.

Abstract: Patients with essential hypernatremia maintain urinary concentrating ability despite plasma hyperosmolality and low plasma vasopressin concentrations. We investigated renal sensitivity to ultralow dose vasopressin infusions in two patients with a syndrome of hypodipsia, hypernatremia with selective osmoreceptor dysfunction, early puberty, and aggressive behavior. The patients were water loaded until a hypotonic diuresis was established. Vasopressin was infused in stepwise increments from 0.4-12 fmol/kg X min. Both patients had increased renal sensitivity to vasopressin, achieving negative free water clearance at infusion rates of 0.4 and 4 fmol/kg X min (normal greater than or equal to 6). Treatment for 3 months with 1-desamino-8-D-arginine vasopressin (DDAVP) led to an improvement in behavior and the reporting, for the first time, of a sensation of thirst. After DDAVP therapy both patients had a reduction of their renal sensitivity to infused vasopressin. We conclude that untreated patients with essential hypernatremia have increased renal sensitivity to vasopressin which is reduced by DDAVP administration.
Which is the apt title for the abstract? option1: Increased renal sensitivity to vasopressin in two patients with essential hypernatremia. option2: AAEE minimonograph #25: Single-fiber electromyography in myasthenia gravis.
Increased renal sensitivity to vasopressin in two patients with essential hypernatremia.

Abstract: A variety of effective drugs are available for the treatment of schizophrenia. Knowledge of the side-effect spectrum of the various classes of antipsychotic drugs is necessary for the clinician to arrive at a rational choice of medication. In general, the preferred drug will be a high-potency neuroleptic. The following basic principles of clinical psychopharmacology should be followed: Consider risk and benefits; clinical experience is prerequisite; establish the diagnosis; select the appropriate class of psychotropic drug for the primary diagnosis; within drug class, the drugs are usually equally effective for patients with the diagnosis; give a dose that is high enough to be effective; choose target symptoms that can be monitored to indicate when to stop or increase the drug; avoid use of multiple drugs when possible; drugs are only one element in a comprehensive treatment strategy. Other modalities need equally careful consideration, e.g., psychotherapy, group therapy, family treatment, and vocational rehabilitation; and consultation with other subspecialists should be sought readily when indicated.
Which is the apt title for the abstract? option1: Schizophrenia and antipsychotic drugs. option2: Detection of cocaine metabolite in perspiration stain, menstrual bloodstain, and hair.
Schizophrenia and antipsychotic drugs.