Clinical Characteristics of Essential Tremor in South India: A Hospital-Based Cohort Study

Introduction

Essential tremor (ET) is the most common adult movement disorder. Classic ET is characterized by action tremor of hands (95% cases), and tremor involving other regions is less common. Recent studies have revealed a few patients exhibiting nontremor features that include cognitive disorders, tandem gait abnormality, mood fluctuations, olfactory abnormality, hearing impairment, and sleep disorders. Very few studies on ET have so far been conducted in India, and the present study is a pioneering attempt to evaluate the clinical characteristics of patients diagnosed with ET.

Materials and Methods

A standardized assessment protocol was used to collect data. Diagnosis of ET was established using consensus criteria established by the Movement Disorder Society. Tremor Research Group Essential Tremor Rating Assessment Scale was used to evaluate tremor impact. The severity of hand tremor was assessed by Glass Scale, and cognitive function was assessed by Mini-Mental Status Examination.

Results

Out of the 45 patients enrolled, 73.3% were male and 26.6% were female, with a mean age of 44 ± 15 years. Postural tremor was observed in all, followed by intention tremor in 9 and rest tremor in 6 patients. Tremor of the hand was identified to be most predominant (100%). Voice tremor was observed in 15 (33.3%) patients and head tremor in 12 patients (26.6%) who were all females. Leg tremor was observed in 12 patients (26.6% of patients) and tongue tremor in 6 (13%) patients. Baseline asymmetry of tremor was observed in 60% of patients and positive family history in 35% of patients. The most common nontremor feature was tandem gait abnormality (40%). Moreover, most of the patients had Glass Scale II.

Conclusion

Baseline asymmetry of tremor and male predominance were observed in the study. While hand tremor was the most common form of tremor, tandem gait abnormality was the most common nontremor feature as observed in patients with ET.

Dietary pattern in Adult Patients with Acute Stroke in South India: A Case-Control Study from a Tertiary Care Center in Hyderabad

BACKGROUND AND OBJECTIVE

Diet plays a crucial role in the occurrence of stroke. But very few studies have so far been conducted with focus on this aspect of acute stroke in India. The objective of the study was to identify the dietary pattern in patients with acute stroke in South India.

MATERIALS AND METHODS

Patients with first-ever acute stroke (ischemic and hemorrhagic) admitted between June 2017 and November 2017 were enrolled and compared with age- and sex-matched controls. Information was collected using a pro forma.

RESULTS

Out of 293 acute stroke patients, 150 were enrolled and compared with 150 controls. The mean age was 52.3 ± 12.6; years 112 (74.6%) patients were male. The majority of them were on traditional diet that included a daily intake of rice (98.6%) and pulses (40.6%). Hypertension (73.3%) was the major vascular risk factor for stroke (P < 0.0001). Significant differences were observed in risk factors such as diabetes (P < 0.0001), smoking (P = 0.0001), alcohol use (P = 0.0017), and heart disease (P = 0.0002), when stroke patients were compared with controls. Stroke patients reported a lower intake of green leafy vegetables (P = 0.0001; odds ratio [OR] 0.17), roots and tubers (P = 0.0016; OR 0.21), and fruits (P = 0.0022; OR 0.29). There was at the same time a higher intake of red meat products (P = 0.04; OR 2.41), organ meats (P = 0.0093; OR 4.35), fried snacks (P = 0.0038; OR 2.01), and pickles (P = 0.04; OR 1.81) although the data suggested lesser consumption of prawn and crab (P = 0.04; OR 0.55) and water (P = 0.0001 OR 4.59) among stroke patients. Higher consumption of fruit juices (P = 0.0008) and junk foods (P = 0.03) was observed in young stroke patients (age ≤45 years) whereas the intake of chicken (P = 0.03) and alcohol (P = 0.0001) was observed to be more among men than among women.

CONCLUSION

Majority of stroke-afflicted patients in South India consume white rice and dal. There is lower intake of water, green leafy vegetables, and fruits and higher consumption of red meat, organ meat, and pickles among stroke patients.

Knowledge of stroke and the window period for thrombolytic therapy in ischemic stroke among South Indians: A hospital-based survey with educational intervention

Objectives

The objective of this study was to determine the awareness of stroke in regards to the risk factors, warning symptoms, and knowledge of the therapeutic window period among varied strata of non-medical people attending a tertiary care center.

Materials and Methods

The interventional study involved the collection of data regarding awareness of stroke using a structured questionnaire with a total score of 16. Pre-intervention assessment was followed by intervention in the form of education regarding awareness of stroke administered one-on-one for personalized and effective comprehension by subjects. Then, subjects were asked to recall the information that was delivered to them and were scored accordingly.

Results

Among the 500 subjects included, 51% were female. About 76.8% of participants were young (age <50 years), and 83.4% were literate. Only 25.4% of participants were aware of the brain as the site of stroke. About 32.2% of candidates were aware of a few risk factors for stroke. Among them, the majority of participants were aware of hypertension (24%) as a risk factor. The most known warning symptom was "Numbness" or weakness of arm. The majority of the subjects (97.8%) were unaware of a therapeutic window period for stroke being 4.5 h or below. The mean pre-intervention score was 2.52 ± 1.65 while the mean post-intervention score was 15.10 ± 1.79 (P < 0.0001).

Conclusion

The study showed that even among literate participants, only a meager number of subjects were aware of the golden window period of intravenous thrombolysis. Educational intervention by means of an in-person and one-on-one explanation achieved significant levels of understanding of stroke. The study could be used to formulate large-scale educational programs that focus on spreading awareness of symptoms and risk factors while also instilling the importance of timely medical intervention for efficient thrombolytic therapy.

Cell-free mitochondrial DNA quantification in ischemic stroke patients for non-invasive and real-time monitoring of disease status

BACKGROUND

Acute ischemic stroke (AIS) is one of the major causes of the continuous increasing rate of global mortality due to the lack of timely diagnosis, prognosis, and management. This study provides a primitive platform for non-invasive and cost-effective diagnosis and prognosis of patients with AIS using circulating cell-free mitochondrial DNA (cf-mtDNA) quantification and validation.

AIM

To evaluate the role of cf-mtDNA as s non-invasive, and affordable tool for real-time monitoring and prognosticating AIS patients at disease onset and during treatment.

METHODS

This study enrolled 88 participants including 44 patients with AIS and 44 healthy controls with almost similar mean age group at stroke onset, and at 24 h and 72 h of treatment. Peripheral blood samples were collected from each study participant and plasma was separated using centrifugation. The cf-mtDNA concentration was quantified using nanodrop reading and validated through real-time quantitative polymerase chain reaction (RT-qPCR) of NADH-ubiquinone oxidoreductase chain 1 (ND1) relative transcript expression levels.

RESULTS

Comparative analysis of cf-mtDNA concentration in patients at disease onset showed significantly increased levels compared to control individuals for both nanodrop reading, as well as ND1 relative expression levels (P < 0.0001). Intergroup analysis of cf-mtDNA concentration using nanodrop showed significantly reduced levels in patients at 72 h of treatment compared to onset (P < 0.01). However, RT-qPCR analysis showed a significant reduction at 24 h and 72 h of treatment compared to the disease onset (P < 0.001). The sensitivity and specificity were relatively higher for RT-qPCR than nanodrop-based cf-mtDNA quantification. Correlation analysis of both cf-mtDNA concentration as well as ND1 relative expression with National Institute of Health Stroke Scale score at baseline showed a positive trend.

CONCLUSION

In summary, quantitative estimation of highly pure cf-mtDNA provides a simple, highly sensitive and specific, non-invasive, and affordable approach for real-time monitoring and prognosticating AIS patients at onset and during treatment.

I-Beam Sign in Progressive Supranuclear Palsy

BACKGROUND

Postural instability occurs in both progressive supranuclear palsy (PSP) and idiopathic Parkinson's disease (IPD).

OBJECTIVE

Testing for postural instability using a pull test helps to differentiate IPD from PSP based on the presence of an I-beam sign in the latter.

METHODS AND MATERIALS

Here, we demonstrate the I-beam sign in a 65-year-old lady who presented with initial marked postural instability.

RESULTS

In PSP, postural instability occurs early. Here, we found that in patients with PSP on the backward pull test, they fall without taking a single step, like a building falls without an I-beam. This sign is called I-beam sign. In patients with IPD, this sign is absent as they take one or a few steps before falling. Clinical examination showed mild restriction of upward gaze, and there was radiological evidence of midbrain atrophy. The present case was diagnosed as PSP with a postural instability variant.

CONCLUSION

The presence of the I-beam sign in patients with Parkinsonism suggests PSP.

Cervicomedullary Compression in Achondroplasia: A Feared Complication and an Unforeseen Risk Factor of Posterior Circulation Stroke

Achondroplasia is an autosomal dominant disorder with defect in the ossification of the cartilage of long bones. Many bony abnormalities constitute its clinical features, with craniovertebral junction (CVJ) anomalies being one of most common issues which need to be addressed at the earliest. CVJ anomalies in individuals may cause neurovascular compression, which may warrant an early surgery to prevent catastrophic complications. Posterior circulation strokes secondary to CVJ anomalies are well known. We hereby present an unusual case of posterior circulation stroke in an achondroplastic dwarf who presented to our tertiary care centre. Prospective case study. The present case adds to the existing literature about one of the preventable causes of fatal posterior circulation strokes in the young. A high index of suspicion for neurovascular compression at the foramen magnum and early initiation of treatment in achondroplastic young individuals may have gratifying results.

Diffusion Restriction in Bilateral Thalami: Beyond Artery of Percheron Infarct

Background

Bilateral thalamic infarction, especially the medial thalamus, has been characteristically described in the artery of Percheron (AOP) affection. However, bilateral thalamic restriction has been described in many entities beyond the AOP infarction.

Objective

Here we describe a case series (three cases) with infection as an etiology for bilateral thalamic lesions in the topographic distribution of the AOP from a tertiary care center in tropical India.

Materials and Methods

: Case series during a 1-year period collecting cases with bilateral thalamic diffusion restriction on MRI who did not have thalamic infarcts and their outcomes.

Results

: Bilateral thalamic lesion can occur in both bacterial and viral infections such as tuberculosis, dengue, and SARS-COV-2. Thus, we intend to add infections as one of the etiologies in the ever-expanding list of conditions that produce bilateral thalamic restriction.

Conclusions

All the acute symmetric thalamic lesions are not always secondary to vascular insult. Accurate assessment and prompt diagnosis can prevent unnecessary delays in treatment. To our knowledge, this is the first case series in the literature that throws light on the bilateral thalamic lesions in the topographic distribution of the AOP secondary to infections in a tropical country like India.

Hypocalcemic recurrent generalized seizures with bilateral basal ganglia and frontal calcification as the initial manifestation of Albright’s hereditary osteodystrophy in a child: A pictorial and video-graphic representations

Albright hereditary osteodystrophy (AHO) is a hereditary metabolic disorder that presents with seizure secondary to hypocalcaemia. A careful phenotypic assessment of patients presenting with seizure clues to the diagnosis of AHO. The characteristic features are short stature,obesity and brachydactyly.Pseudohypoparathyroidism (PHP) is observed in patients with AHO and is characterized by inability of the body to respond appropriately to parathormone, mainly characterized by hypocalcaemia, increased serum parathormone concentration, insensitivity to the biological activity of parathormone, and hyperphosphatemia. In this study, we report a 14-year-old boy with distinctive phenotype of AHO, oral manifestations, and signs of tetany with PHP presenting as recurrent generalized seizure.

Role of cell-free DNA for predicting incidence and outcome of patients with ischemic stroke

Early diagnosis and prognosis of ischemic stroke remains a critical challenge in clinical settings. A blood biomarker can be a promising quantitative tool to represent the clinical manifestations in ischemic stroke. Cell-free DNA (cfDNA) has recently turned out to be a popular circulating biomarker due to its potential relevance for diagnostic applications in a variety of disorders. Despite bright outlook of cfDNA in clinical applications, very less is known about its origin, composition, or function. Several recent studies have identified cell-derived mitochondrial components including mitochondrial DNA (mtDNA) in the extracellular spaces including blood and cerebrospinal fluid. However, the time course of alterations in plasma mtDNA concentrations in patients after an ischemic stroke is poorly understood. DNA is thought to be freed into the plasma shortly after the commencement of an ischemic stroke and then gradually decreased. However, the importance of cell-free mtDNA (cf-mtDNA) in ischemic stroke is still unknown. This review summarizes about the utility of biomarkers which has been standardized in clinical settings and role of cfDNA including cf-mtDNA as a non-invasive potential biomarker of ischemic stroke.